Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.matchemphys.2024.129641

researchmap

Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1007/s10854-024-12542-3

researchmap

Authorship：Last author,　Corresponding author   Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： 10.2109/jcersj2.23175

researchmap

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jnoncrysol.2023.122760

researchmap

Authorship：Last author,　Corresponding author   Language：English  

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.35848/1882-0786/ad09ee

researchmap

Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1063/5.0149523

researchmap

Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.ijleo.2023.171150

researchmap

Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.2109/jcersj2.23043

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

DOI： 10.1002/pssb.202300093

researchmap

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jnoncrysol.2023.122262

researchmap

Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

DOI： 10.1111/jace.18863

researchmap

Other Link： https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jace.18863

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER  

The birefringence in As2S3 glass that is induced by either uniaxial stress or illumination with linearly-polarized light ((h) over bar omega = 2.0 and 2.3 eV) is comparatively studied using a specially-designed phase meter operating at a wavelength of 633 nm (similar to 2.0 eV). The photoelastic constant of As2S3 is negative (-6 x 10(-12) Pa-1): the refractive index parallel to an applied uniaxial stress becomes smaller, which is contrastive to that (+3.5 x 10(-12) Pa-1) in SiO2 glass. On the other hand, the photoinduced birefringence in As2S3 is also negative; i.e., the refractive index in the direction parallel to the electric field of excitation light becomes smaller than the perpendicular. These resembling features with comparable magnitudes of the stress- and photo-induced birefringences imply common structural origin. We propose that the negative birefringences can be understood by a unified model that assumes anisotropically-aligned segmental layer structures which are produced by mechanical and photo-structural atomic motions.

DOI： 10.1016/j.jnoncrysol.2022.122017

Web of Science

researchmap

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.optmat.2022.113074

researchmap

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jnoncrysol.2022.121909

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Springer Science and Business Media LLC  

DOI： 10.1007/s10854-022-08989-x

researchmap

Other Link： https://link.springer.com/article/10.1007/s10854-022-08989-x/fulltext.html

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.35848/1347-4065/ac87e2

researchmap

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1007/s10854-021-07508-8

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

We report the origins of the coloration of Bi2O3–SiO2, Bi2O3–B2O3, and Bi2O3–P2O5 glasses. The glasses were quantitatively analyzed to reveal the Bi valence state and network connectivity of silicate, borate, and phosphate. The electronic structure was correlated with Bi valence states, giving two types of signals: those related to optical bandgaps with Bi3+ s–p intra-transition states at 3.6–4.7 eV and visible absorption bands at 2.5–2.7 eV originating from the charge transfer between Bi3+ and Bi5+ and/or plasmonic Bi0 clusters in the colored glasses. These Bi oxide glasses with tvisible transparent and high refractive index are attractive to replace toxic Pb-containing optical glasses.

DOI： 10.1016/j.jnoncrysol.2021.120720

Scopus

researchmap

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.2109/jcersj2.20199

researchmap

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.2320/matertrans.MT-M2020135

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.2320/matertrans.MT-M2020098

researchmap

Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1002/pssb.202000146

researchmap

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1111/ijag.13480

researchmap

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jnoncrysol.2019.119706

researchmap

Authorship：Last author,　Corresponding author   Publishing type：Research paper (scientific journal)   Publisher：IOP Publishing  

DOI： 10.7567/1882-0786/ab40f4

Scopus

researchmap

Other Link： http://iopscience.iop.org/article/10.7567/1882-0786/ab40f4/pdf

Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.optmat.2019.109355

researchmap

Authorship：Lead author,　Corresponding author   Language：English  

DOI： 10.1007/s11082-019-2024-4

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jnoncrysol.2019.119526

researchmap

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1111/ijag.13106

researchmap

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.jnoncrysol.2019.02.030

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

© 2019 The Ceramic Society of Japan. All rights reserved. Calcium phosphates are essential compounds for the sustenance of life, since, for example, many grains that enable to convert food are necessary for use of the fertilizers made of chemically synthesized crystals. We have demonstrated two alternative dry processes for the conversion of hydroxyapatite to tricalcium phosphate by means of thermodynamically controlled heat and electronically generated heat with pulsed laser light. In addition, the conversion efficiency has been quantitatively determined from the Rietveld analysis for powder X-ray diffractionpatterns of the fired and laser-ablated samples. Both conversion processes recycled animals' bones as the source of calcium phosphate, and in the future, this could compensate for the niche area in the absence of wet process for a phosphorus containing sludge through a sewage treatment.

DOI： 10.2109/jcersj2.18190

Scopus

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier B.V.  

The effects of composition and structure on stress-induced birefringence were studied for glasses with the nominal molar compositions xZnO–(67-x)SnO–33P2O5. The photoelastic constant (PEC) changes systematically from negative values to positive values when ZnO replaces SnO, and PEC ≈ 0 when x = 18.5 mol%. The zero PEC composition can be predicted from the observed coordination numbers and bond lengths of the Zn-, Sn-, and P-polyhedra using an empirical model from the literature.

DOI： 10.1016/j.jnoncrysol.2018.06.016

Scopus

researchmap

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.2109/jcersj2.18039

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1002/pssb.201800318

researchmap

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier B.V.  

Glasses with nominal molar compositions xZnO–(67-x)SnO–33P2O5 were prepared and their structures were determined by 31P MAS-NMR spectroscopy, HPLC, and by X-ray and neutron diffraction. Compositional dependent changes in the thermal and optical properties described in Part I of this study are attributed to changes in the coordination environments of Sn2+- and Zn2+-ions and their effects on the phosphate anionic network. The 31P MAS-NMR and HPLC data reveal broader distributions of P-tetrahedra in glasses with greater ZnO-contents, due to disproportionation reactions of diphosphate anions in the glass melts to form isolated monophosphate anions and larger triphosphate anions, and due to the loss of some phosphate during glass preparation. The diffraction experiments reveal that Zn2+ prefers tetrahedral coordination, whereas Sn2+ is initially incorporated in isolated, three-coordinated sites that convert to four-coordinated sites with greater ZnO contents. These four-coordinated sites must share corners when incorporated into the glass structure and the transition from glasses dominated by isolated SnO3 pyramids to those with subnetworks of (Sn, Zn)O4 polyhedra occurs near x = 20, and is reflected by breaks in the composition-property trends. The second break in properties occurs near x = 40, and reflects both the dominance of the ZnO4 units in the metal subnetwork, as well an increase in the relative numbers of monophosphate anions in the glass structure.

DOI： 10.1016/j.jnoncrysol.2018.04.017

Scopus

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.7567/JJAP.57.080310

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier B.V.  

Glasses with nominal molar compositions xZnO–(67-x)SnO–33P2O5 were prepared and their thermal and optical properties are reported. Density, glass transition temperature, thermal expansion coefficient, viscosity, and refractive index change systematically when ZnO replaces SnO. Raman and infrared spectroscopies provide information about the phosphate anions that constitute the glass network. The compositional trends in glass properties are explained considering the linkages between Sn- and Zn-polyhedra and these different phosphate anions. Property trends fall into three compositional ranges defined by low ZnO concentration (0 ≤ x ≤ 20, region I), intermediate ZnO concentration (20 &lt
x ≤ 40, II), and large ZnO concentrations (40 &lt
x ≤ 50, III).

DOI： 10.1016/j.jnoncrysol.2018.01.030

Scopus

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE BV  

The substitution of nitrogen for oxygen in phosphate glasses improves the chemical, thermal and mechanical properties and particularly reduces their very high hygroscopic character, although the preparation of homogeneous and free of defects oxynitride bulk phosphate glasses through ammonolysis represents a big challenge. This work reports on the synthesis and properties of a series of Nd-doped oxynitride phosphate glasses with composition Na0.3K0.3Ba0.2PO3-3/2Nx that may find application as laser hosts. Whereas the glass transition temperature, elastic modulus and index of refraction show a regular increase with the nitrogen content that agrees with previous studies, the effect of nitrogen onto the luminescence of Nd3+ ions appears to be more complicated. The average lifetime of the decay from the F-4(3/2) level decreases with the N/P ratio of the glasses, which is thought to be mainly due to the presence of water from the ammonolysis reaction. However, further thermal treatments under N-2 flow of an oxynitride glass have shown an important reduction of the water content as well as a drastic increase of the luminescence lifetime of Nd3+, this being a promising method for the development of laser phosphate glasses having good chemical and mechanical properties.

DOI： 10.1016/j.jnoncrysol.2017.08.005

Web of Science

researchmap

Authorship：Last author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER INST PHYSICS  

Glasses in the BaO-SnO-P2O5-B2O3 system were prepared and evaluated in order to formulate preform glasses suitable for the fabrication of fiber cores with a very low photoelastic constant. A first glass system (I: xBaO-(60-x)SnO-40P(2)O(5)) was designed with a constant P2O5 content and various BaO contents (0-40 mol. %). Introduction of 3 mol. % of B2O3 to enhance the glass stability leads to the second glass system (II:x'BaO-(57-x')SnO-40P(2)O(5)-3B(2)O(3)) with 33-38 mol. % BaO. The structure of both systems was investigated by 1D/2D magic-angle spinning nuclear magnetic resonance, Raman, and Fourier transform infrared spectroscopic techniques. P-31 NMR showed the presence of Q(2) and Q(1) units in the first system and correlation B-11/P-31 NMR indicated that boron enters into the network as B(OP)(4) structural units. The photoelastic constant was determined and the stability of the best formulations as well as their refractive index dispersion was established. The drawing temperature and isothermal heating time (without crystal precipitation) parameters were also accurately measured by using experimental time-temperature-transition. Considering that the refractive indices of the core and the cladding materials must match, detailed core and cladding compositions for a fiber enabling single-mode waveguide transmission were proposed. Published by AIP Publishing.

DOI： 10.1063/1.4998957

Web of Science

researchmap

Language：Japanese   Publishing type：Research paper (scientific journal)  

CiNii Books

researchmap

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1007/s40831-017-0130-8

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE BV  

The relationships between the structure and corrosion resistance of glasses with the nominal compositions xBaO-(100 - x)[yFe(2)O(3)-(1 y)P205], where x = 0,10, 20, and y = 30, 35, 40, are discussed. High performance liquid chromatography was used to characterize the phosphate anions that constitute the glass structure, and Mossbauer spectrometry was used to characterize the fractions and coordination environments of Fe2+ and Fe3+ ions in the glasses. Weight loss measurements in water were recorded and the most durable glasses were those with the smallest average phosphate anion sizes, independent of the relative BaO and Fe2O3 contents. (C) 2017 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jnoncrysol.2017.01.027

Web of Science

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：OPTICAL SOC AMER  

Sn-containing silicate glasses with zero photoelastic constant (PEC) can potentially substitute zero-PEC Pb-containing glasses as optical fiber current sensor components based on the Faraday effect. These compounds allow monitoring of the electric power by measuring the electric current in high-voltage conductors operated with a 1550-nm light. The toxicity of Pb in these glasses still remains an important issue. However, replacing Pb in the sensors while minimizing the PEC of the resulting device would represent a significant breakthrough. We report a 43.5SnO-56.5SiO(2) glass in molar% with zero PEC of + 0.01 Chi 10(-12) Pa-1 observed with a wavelength of 632.8 nm. (C) 2017 Optical Society of America

DOI： 10.1364/OME.7.000760

Web of Science

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：SPRINGER  

Pb-containing glasses such as the PbO-SiO2 series are useful in optical devices because of their low-photoelastic constants (PECs); however, the toxic Pb component in these glasses is problematic. Transparent ternary ZnO-SnO-P2O5 glasses are potential substitutes for low-PEC Pb-containing glasses, but their thermal behavior is not well understood, which inhibits their ability to be drawn into fibers. Herein, we report the surface crystallization behavior of transparent ternary ZnO-SnO-P2O5 glasses, including those with low-PEC compositions, heated under isothermal conditions to temperatures above their glass-transition temperatures. The crystallization conditions for low-PEC phosphate glasses during their thermal processing into shapes of optical modules were deduced. The crystalline compounds precipitated on the surfaces were investigated via X-ray diffraction analysis, micro-Raman spectroscopy, and microscopic observations. A time-temperature-transformation diagram was constructed on the basis of the thermal stability of the glasses. We expect that this enhanced understanding of the crystallization behavior induced by the reshaping process will enable fabrication of precise polarization control devices with low PECs, such as optical-fiber current sensors, optical lenses, and filters.

DOI： 10.1007/s10853-016-0507-2

Web of Science

researchmap

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1007/s40831-016-0053-9

researchmap

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：OPTICAL SOC AMER  

We report transparent RO-SnO-P2O5 (R = Zn, Ba, Sr) glasses with low photoelastic constant less than similar to 1 B (1 x 10(-1)2 Pa-1) and high refractive index more than similar to 1.65. The BaO or SrO substitution effect of SnO on optical properties is nearly the same as ZnO substitution of the ternary zinc tin-phosphate glass without hazardous oxide. A new series of BaO-SnO-P2O5 glass characterized with a very low photoelastic constant of similar to 0.08 B, high refractive index (similar to 1.66), and better water durability is a candidate for precise polarization control devices such as optical filters and beam splitters. (C) 2015 Optical Society of America

DOI： 10.1364/OL.41.000045

Web of Science

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：IOP PUBLISHING LTD  

An optical fiber made of zinc tin boro-phosphate glass having a zero photoelastic constant, good water durability, and excluding hazardous elements was drawn from a prepared preform for use in a fiber-type current sensor device. The proposed cladding compositions enable single-mode propagation for a wavelength of 1550 nm, which is estimated from the difference in the refractive index between the core and cladding compositions. The drawing conditions should be controlled since the multiple-component glass is very sensitive to changes in viscosity and crystal precipitation during the heat-treated stretching of the preform. The temperature dependence of viscosity in the core and cladding reveals the feasibility of drawing. (c) 2015 The Japan Society of Applied Physics

DOI： 10.7567/JJAP.54.100307

Web of Science

J-GLOBAL

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER INST PHYSICS  

We report properties of zero birefringent xZnO-(67-x) SnO-(33-y) P2O5-yB(2)O(3) glasses, within 18.5 <= x <= 22 and y = 0, 3, and 10 mol. %. These compositions of boro-phosphate glasses provide both zero photoelastic constant (PEC) and improved water durability. x = 19 and y = 3 compositions show minimum PEC of -0.002 x 10(-12) Pa-1, which can contribute to candidate material for fiber current sensor devise without lead. The structures of zero photoelastic glasses were investigated by Raman scattering and nuclear magnetic resonance spectroscopies. Compositions of zero PEC glasses are explained by the empirical model proposed by Zwanziger et al. [Chem. Mater. 19, 286-290 (2007)]. (C) 2015 Author(s).

DOI： 10.1063/1.4917347

Web of Science

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE SA  

Effect of B2O3/P2O5 substitution on the properties and structure of the ternary 67SnO-(33-x)P2O5 -xB(2)O(3) composition line (from x = 0-33 mol%) are examined in this contribution. We show that density and glass transition temperature increase while molar volume and thermal expansion coefficient decrease with increasing B2O3 concentration. Density and thermal properties experience an original three-domain evolution with rapid (region I: 0 <= x < 5), substantial (II: 5 <x <= 15), and moderate (III: 15 <x <= 33) increase. In order to explain this unconventional behaviour, the glass structure has been investigated using high magnetic field 1 dimensional P-31 and B-11 MAS-NMR, micro-Raman and infrared spectroscopies. B-11 MAS-NMR experiments allow to (i) monitor the 3- and 4-fold coordinated borate species proportion and (ii) highlight the presence of unreported 4-fold coordinated species in the region (III). Finally, it is shown that substitution of P2O5 by B2O3 induces an alteration of the dimeric phosphate network and formation of mixed anion structure that consists of Q(0) phosphate units, 3- and 4-fold coordinated borate units and their combinations. (C) 2014 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.matchemphys.2014.11.021

Web of Science

J-GLOBAL

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：ROYAL SOC CHEMISTRY  

The structure of tin borophosphate glasses, considered for the development of low temperature sealing glasses or anode materials for Li-batteries, has been analysed at the intermediate length scale by a combination of high field standard and advanced 1D/2D nuclear magnetic resonance techniques. The nature and extent of B/P mixing were analysed using the B-11(P-31) dipolar heteronuclear multiple quantum coherence NMR sequence and the data interpretation allowed (i) detecting the presence and analysing the nature of the B-O-P linkages, (ii) re-interpreting the 1D P-31 spectra and (iii) extracting the proportion of P connected to borate species. Interaction between the different borate species was analysed using the B-11 double quantum-simple quantum experiment to (i) investigate the presence and nature of the B-O-B linkage, (ii) assign the different borate species observed all along the composition line and (iii) monitor the borate network formation. In addition, Sn-119 static NMR was used to investigate the evolution of the chemical environment of the tin polyhedra. Altogether, the set of data allowed determining the structural units constituting the glass network and quantifying the extent of B/P mixing. The structural data were then used to explain the non-linear and unusual evolution of the glass transition temperature.

DOI： 10.1039/c5cp02095f

Web of Science

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：OPTICAL SOC AMER  

Red fluorescence lamellae in prismatic layers of Pinctada vulgaris shell were investigated. SEM-EDS, XRD, and TG-DTA were utilized to characterize prismatic layers. We found that prismatic layers are calcitic prismatic (CP) layers with rich organic substances. Excitation spectrum for red fluorescence determined by a spectrophotometer indicates that the fluorescent matter in the organic substances is porphyrin compound derivatives. By using a fluorescence microspectroscope, the cross section of CP layers shows red fluorescence forming lamellar pattern. The lamellar pattern consists of red and black parallel zones with a modulation of emission intensity. Elemental mapping show a correlation of the fluorescence intensity decay with sulphur-rich zones occupying the CP layers in the black zones. (C)2014 Optical Society of America

DOI： 10.1364/OME.4.001813

Web of Science

researchmap

Language：English   Publishing type：Research paper (international conference proceedings)  

J-GLOBAL

researchmap

A series of transparent SnO-P2O5 (SP) and SnO-P 2O5-B2O3 (SPB) glasses, with the composition 67SnO-(33-x) P2O5-xB2O3 where x=0, 3, 5, 7 and 10 mol%, were immersed in distilled water at 40 and 70°C for up to 504 hours (3 weeks). Their dissolution behaviour was evaluated by macroscopic inspection, by measurement of weight loss per unit area, changes in the pH of the solution, x-ray diffraction analysis and infrared spectroscopy. The dissolution of Q1 phosphate species and/or BO 3 and BO4 borate units into water for the SP and SPB glasses with ≤7 mol% B2O3 is accompanies crystallization of Sn3(PO4)2. Infrared spectroscopy provides further evidence of the good durability of SPB glass containing 10 mol% B2O3 and reveals the formation of a hydrous layer related to B-O-B linkages on the glass surface. © 2013 Publishing Technology.

Scopus

researchmap

Language：English   Publishing type：Research paper (scientific journal)  

The thermal properties of ZnO-SnO-P2O5 (ZSP) glasses are evaluated for preparing optical fibres relevant to fibre current-sensor applications. Time-temperature-transformation (TTT) diagrams of ZSP glasses are presented based on x-ray diffraction analysis and microstructural observations. Thermal stability for fibre drawing is discussed along with viscosity data. Selected fabrication conditions, which can minimize microcrystal formation during isothermal heat treatments, are proposed for ZSP glass fibres. © 2013 Publishing Technology.

Scopus

researchmap

Authorship：Lead author,　Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：SOC GLASS TECHNOLOGY  

The thermal properties of ZnO-SnO-P2O5 (ZSP) glasses are evaluated for preparing optical fibres relevant to fibre current-sensor applications. Time-temperature-transformation (TTT) diagrams of ZSP glasses are presented based on x-ray diffraction analysis and microstructural observations. Thermal stability for fibre drawing is discussed along with viscosity data. Selected fabrication conditions, which can minimize microcrystal formation during isothermal heat treatments, are proposed for ZSP glass fibres.

Web of Science

J-GLOBAL

researchmap

Language：Japanese   Publishing type：Research paper (scientific journal)  

researchmap

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Mining and Materials Processing Institute of Japan  

Glass samples of Na₂O–P₂O₅–SiO₂ containing Nd₂O₃ with <tt>～</tt>0.3 mol% were prepared by melting on a hotfilament and quenching. Absorption spectra of 4f-4f forced-electric dipole transitions of Nd³⁺ were evaluated with a commercial spectrophotometer. Local structures around Nd³⁺ ions were estimated by the shape, peak wavelengths, and absorbance of ⁴I_9/2<tt>→</tt>⁴G_5/2, ²G_7/2 and ⁴I_9/2<tt>→</tt>⁴F_5/2, ²H_9/2 transitions with the interpretation of previous results concerning EXAFS analysis. Absorption spectra indicate that the composition at which Nd³⁺ ions are selectively coordinated by PO₄ tetrahedra is [Na₂O]/[P₂O₅] 2 in a molar ratio for Na₂O–P₂O₅ glasses and [Na₂O]/[P₂O₅] 1 for Na₂O–P₂O₅–SiO₂ glasses. IR spectroscopy results the glasses mainly consist of PO₄ Q² units and P–O–P bonding. Elution tests reveal that Nd constituents, coordinated with PO₄ tetrahedra, with a large fraction of <tt>～</tt>0.9 were dissolved into ultra-pure water at 30ºC for the phosphosilicate glasses with [Na₂O]/[P₂O₅] 1.

DOI： 10.2473/journalofmmij.129.591

CiNii Books

researchmap

Other Link： https://jlc.jst.go.jp/DN/JALC/10040404232?from=CiNii

Language：English   Publishing type：Research paper (scientific journal)   Publisher：OPTICAL SOC AMER  

The photoelastic constant (PEC) is evaluated for 15 zinc tin phosphate glasses in a series of xZnO-(67-x)SnO-33P(2)O(5) where x is 0-30 mol. % at 0.5-7 mol. % intervals. The phase retardation of polarized light, passing through a disk sample with applying various uniaxial loads, was measured for PEC determinations by using a frequency stabilized transverse Zeeman He-Ne laser as a polarized light source. The substitution of ZnO for SnO results in the increase of PEC from negative to positive values in the range of -1.43 and +/- 1.45 x 10(-12) Pa-1. The minimum PEC value of 0.04 +/- 0.02 x 10(-12) Pa-1 was experimentally obtained in the 18.5 mol. % ZnO-48.5 mol. % SnO-33 mol. % P2O5 glass. (C) 2012 Optical Society of America

DOI： 10.1364/OL.37.004203

Web of Science

J-GLOBAL

researchmap

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Mining and Materials Processing Institute of Japan  

The effect of Al<SUB>2</SUB>O<SUB>3</SUB> on glass transition temperature T<SUB>g</SUB> and thermal expansion coefficient α is studied for CaO-Al<SUB>2</SUB>O<SUB>3</SUB>-SiO<SUB>2</SUB> glasses including 45, 50, 55, and 60 mol% SiO<SUB>2</SUB> with a molar ratio of CaO/Al<SUB>2</SUB>O<SUB>3</SUB> > 1. T<SUB>g</SUB> increases and α decreases monotonically with increasing Al<SUB>2</SUB>O<SUB>3</SUB> concentration. The result of infrared spectra suggests the formation of ring-type mixed anions of SiO<SUB>4</SUB> and AlO<SUB>4</SUB> due to Al<SUB>2</SUB>O<SUB>3</SUB> addition. The measured values of α are related to a parameter calculated from the coulomb force between cation and oxide anion based on chemical composition.

DOI： 10.2473/journalofmmij.128.150

CiNii Books

researchmap

Other Link： https://jlc.jst.go.jp/DN/JALC/10002518649?from=CiNii

Language：English   Publishing type：Research paper (scientific journal)   Publisher：NATL INST OPTOELECTRONICS  

Structures and optical properties of selenium-loaded single-crystalline ZSM-5 (z-Se) have been studied. Obtained results are compared with those for bulk Se. Structural measurements using Raman-scattering and X-ray diffraction reveal that Se clusters in the ZSM-5 exist as single chains. Electron-spin resonance (ESR) measurements suggest that the chain has finite lengths of 5 nm. Optical properties and photoinduced phenomena of z-Se are explored through ESR, absorption (a), and photoluminescence (PL) measurements upon exposure of visible light at room temperature.

Web of Science

Scopus

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：NATL INST OPTOELECTRONICS  

We consider tactics for attaining maximal optical nonlinearity at telecommunication wavelengths of 1.5 mu m ((h) over bar omega approximate to 0.8 eV). The nonlinearity becomes greater in a material with a smaller optical gap, but it must be wider than 1 eV for needed transparency. This trade-off makes the chalcogenide glass suitable for fiber devices (similar to 1 m), including optical switches and intensity stabilizers. However, for waveguide devices with optical path lengths of similar to 1 cm, greater nonlinearity is required. We propose Se-loaded zeolites, which possess greater intensity-dependent nonlinear coefficients than those of pure Se by three orders of magnitude, is promising for this purpose.

Web of Science

researchmap

Language：English   Publishing type：Research paper (scientific journal)  

researchmap

Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

researchmap

Language：English   Publishing type：Research paper (scientific journal)  

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE BV  

Semi-free As2S3 flakes undergo visible-scale anisotropic deformations when exposed to linearly-polarized bandgap illumination. We investigate the behavior and also those in amorphous Se, GeS2, AgAsS2, and crystalline As2S3. These results suggest that the deformation occurs through photo-induced birefringence, photo-induced fluidity. and optical force. (C) 2009 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jnoncrysol.2008.10.021

Web of Science

researchmap

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER INST PHYSICS  

Photoinduced phenomena in Se-loaded ZSM-5 single crystals have been studied through electron-spin resonance, optical absorption, and photoluminescence spectroscopy. Marked exposure effects appear at room temperature. Upon illumination of visible light, an electron-spin signal at g approximate to 2.00 increases by an order, subgap absorption of 10(3) cm(-1) appears, and photoluminescence at subgap regions weakens to a half. Timescales of these photoinduced changes including recoveries are not the same, which suggests different origins for the three changes. The spin increase evinces bond scission in single Se chains. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3143612]

DOI： 10.1063/1.3143612

Web of Science

J-GLOBAL

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER INST PHYSICS  

Nonlinear optical properties of Se-loaded ZSM-5 single crystals have been studied comparatively with those of glassy Se. Two-photon absorption coefficients and intensity-dependent refractive-index of the Se-zeolite are higher by three orders of magnitude than those of glassy Se. The enhancements can be ascribed to electron confinement in single Se chains.

DOI： 10.1063/1.3155452

Web of Science

J-GLOBAL

researchmap

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER INST PHYSICS  

Atomic structures of Se clusters impregnated into ZSM-5 single crystals have been investigated through structural and optical experiments. Raman-scattering spectroscopy suggests that Se in the zeolite takes single chain structures. X-ray diffraction implies that the chains form fourfold (not threefold as in trigonal Se) helices. The chain length is estimated from weight and electron-spin resonance measurements at 102 atoms. The material shows an optical absorption edge at h(omega) similar or equal to 2.2 eV, which accompanies dichroism, suggesting chain alignment in the zeolite pores. c 2009 American Institute of Physics. [DOI: 10.1063/1.3143609]

DOI： 10.1063/1.3143609

Web of Science

J-GLOBAL

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：WILEY-V C H VERLAG GMBH  

Semi-free As2S3 glass flakes undergo sub-mm scale anisotropic deformation upon illumination of linearly-polarized cw bandgap light. The mechanism has been ascribed to photoinduced birefringence, optical torque, and photo-induced fluidity. Quantitative measurements demonstrate that generated optical torque is similar to 10(-20) Nm under a light intensity of 1 mW. This value combined with measured deformation rates for As2S3 cantilevers suggests a related photo-induced fluidity of 10(-1) P-1, which is much more fluidal (similar to ten orders) than that reported in the conventional photo-induced fluidity. Reasons for this discrepancy are discussed. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

DOI： 10.1002/pssa.200881349

Web of Science

J-GLOBAL

researchmap

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：PERGAMON-ELSEVIER SCIENCE LTD  

Sulfur, selenium, and tellurium were loaded into sub-millimeter size ZSM-5 single crystals, and the optical properties have been comparatively studied. S and Te show similar features, while Se is unique. S and Te have optical absorption edges at wavelengths of similar to 400 nm with transmission dips at similar to 450 nm, while Se has the edge at similar to 550 nm. The three materials provide photoluminescence at visible wavelengths, with the intensities of S and Te being stronger than that of Se by two orders. These optical properties imply that S and Te in the zeolite form small atomic units such as S(3) and Te(2), while Se condenses into single-chain structures. (C) 2009 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.ssc.2009.03.007

Web of Science

J-GLOBAL

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：SPRINGER  

Two aspects of photoinduced phenomena in oxide and chalcogenide glasses have been studied. One is a comparison of irreversible, reversible, and transitory changes in As(2)S(3), which gives insights into universal features of the photoinduced phenomenon. The other is composition dependence of structures and photodarkening in GeO(2)-GeS(2) glasses. The dependence suggests that percolating GeS(2) structures are required for the photodarkening.

DOI： 10.1007/s10854-007-9432-0

Web of Science

researchmap

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：JAPAN SOC APPLIED PHYSICS  

Microscopic structures of amorphous Ge2Sb2Te5 films, electrically phase-changed using co-planar electrodes, have been studied through electrical and structural investigations. Microscope images show a structured phase-change region consisting of a narrow channel, banks on both sides, and rough peripheral regions. The room-temperature resistivity is similar to 10 (- 30) Omega.cm, which has a metallic temperature dependence. Micro-Raman scattering spectra at the channel and the bank exhibit peaks due to crystalline Te and tellurides. X-ray diffraction patterns from the films, which contain many channels, present crystalline peaks ascribable to cubic GeTe and other compounds. These observations suggest that the Ge2Sb2Te5 melt is liable to phase-separate under electrical self-heating. (c) 2008 The Japan Society of Applied Physics.

DOI： 10.1143/APEX.1.021501

Web of Science

J-GLOBAL

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：NATL INST OPTOELECTRONICS  

The chalcogenide glass is known to exhibit prominent anisotropic deformations when illuminated by linearly-polarized bandgap light. We report new deformation phenomena for As2S3. We also propose that many deformation phenomena can be accounted for by an optical force model.

Web of Science

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：SPRINGER  

Linear and nonlinear optical properties in oxide and chalcogenide glasses have been studied comparatively. Applying a semiconductor concept to these glasses, we show that maximal nonlinear refractive-index at optical communication wavelengths is similar to 10(-4) cm(2)/GW, which can be obtained in materials with bandgap energy of similar to 1.6 eV. It is also shown for SiO2 and As2S3 that linear and nonlinear optical excitations induce different photostructural changes, which are attributable to different photo-electronic transition probabilities.

DOI： 10.1007/s10854-007-9164-1

Web of Science

researchmap

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE BV  

The origin of photoluminescence (PL) having UV emission from Ce3+ ions in p(5+) -co-doped SiO2 glasses was studied through the elucidation of the coordination structure around a Ce3+ by pulsed-EPR electron spin echo envelope modulation (ESEEM) spectroscopy. Simulation of the observed ESEEM pattern revealed that the number of p(5+) in the coordination sphere is similar to 10 times larger than that estimated from the random distribution of P5+, demonstrating the formation of a solvation shell structure. There are two types of the coordination manner of P-O bonds in the solvation structure, corner sharing and edge sharing. This solvation is close to that in phosphate glasses, giving a weak ligand field around Ce3+ ions, i.e., the peak position and the lifetime of Ce3+ ion move to a shorter side compared with the P-free SiO2 glass. (c) 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jlumin.2006.01.186

Web of Science

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：NATL INST OPTOELECTRONICS  

Glass exhibits many kinds of photoinduced phenomena, among which the giant photo-expansion appearing in chalcogenicle glasses such as As(2)S(3) may be the most dramatic and promising. Its feature, mechanism, and application including micro-lenses are described.

Web of Science

researchmap

Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE BV  

A dramatic increase of F-2-laser induced room temperature-stable point defects in 'wet' synthetic silica glass occurs when irradiation temperature is lowered to 80 K. Contrary to the predictions based on the established models of defect processes, a large part of defects induced at 80 K remains stable also at the room temperature. The intensities of the laser-induced optical absorption bands of the non-bridging oxygen hole centers (2.0 and 4.8 eV) and E'-centers (5.8 eV) are comparable to those created by neutron irradiation (10(18) n/cm(2)). A growth of infrared absorption peak at 2237 cm(-1) indicates creation of silicon hydride (SiH) groups. A study of irradiation dose dependences and irradiation efficiency at intermediate temperatures (160 K) suggests a novel radiation damage mechanism by insertion of atomic hydrogen in electronically excited Si-O bond. EPR spectra show E'(gamma)-like centers overlapped by a new type of E'-centers, characterized by a hyperfine splitting of 0.08 mT of the low-field peak in the derivative spectrum. The new E'-center is assigned to a silicon dangling bond, with the Si atom bonded by two bridging oxygens and an OH group ('E'(OH)'). Similar centers have been previously observed on SiO2 surfaces. (c) 2006 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jnoncrysol.2006.01.101

Web of Science

researchmap

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER CHEMICAL SOC  

The codoping effect mechanism of Al and P on the solubility enhancement of Er3+ ion in SiO2 glass was clarified by electron spin-echo envelope modulation spectroscopy. It turned out that doped P ions preferentially coordinate to the Er3+ ion to form a "solvation shell structure", and the environment is similar to that in phosphate glass, while doped Al ions do not form such a selective solvation structure, taking octahedral coordination. This striking difference indicates that the primary roles of the P-doping and the M-doping are attributed to "enthalpy of mixing" and to "entropy of mixing", respectively.

DOI： 10.1021/jp060702w

Web of Science

researchmap

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMERICAN PHYSICAL SOC  

Effects of codoping of phosphorus and/or boron on the coordination sphere of a Ce3+ in SiO2 glasses were examined by applying pulsed electron paramagnetic resonance (EPR) electron spin echo envelope modulation (ESEEM) spectroscopy. Simulation of the observed ESEEM pattern revealed a striking difference in the solvation shell structure between the P-doped and the P-free glasses, i.e., the P doping is very effective for the formation of the solvation shell, while no such an effect was observed for the B doping. When P and B are simultaneously doped, the solvation shell structure is close to that in the P-doped samples. Photoluminescence properties of Ce3+ in these samples were found to be classified into two categories corresponding to the solvation shell structures.

DOI： 10.1103/PhysRevB.72.212101

Web of Science

J-GLOBAL

researchmap

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：CHEMICAL SOC JAPAN  

Photoluminescence (PL) due to Ce3+ in SiO2 glass is strongly influenced by co-doping of phosphorus (P), whose features such as peak energy and fluorescence lifetime are very close to those in phosphate glass. The origin for this striking effect of the P co-doping has been clarified through the elucidation of the coordination structure around a Ce3+ by pulsed EPR ESEEM spectroscopy. Analysis of the observed ESEEM pattern with simulation revealed that the number of P-ions in the coordination sphere is larger by an order of magnitude than that expected from the uniform distribution of P, demonstrating the formation of a solvation shell structure. It has been found that two types of the coordination manner of P-O bonds co-exist in the solvation structure, corner-sharing and edge-sharing. This solvation shell structure is almost the same as that for the calcium phosphate glass.

DOI： 10.1246/cl.2005.1116

Web of Science

J-GLOBAL

researchmap

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：AMER INST PHYSICS  

A principle of self-developing microlenses for semiconductor lasers has been demonstrated using a photosensitive glass, As2S3. The glass film is placed in front of a semiconductor laser, the light from which increases the refractive index and thickness of the film. If its position and thickness are properly selected, the illuminated film operates as an aspherical microlens which can focus an elliptical laser beam to a circular spot. (C) 2003 American Institute of Physics.

DOI： 10.1063/1.1598650

Web of Science

researchmap

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：ELSEVIER SCIENCE BV  

Three types of As2S3 microlenses attached onto end surfaces of optical fibers have been fabricated, and their characteristics are evaluated. These lenses are formed through photostructural transformations induced by He-Ne laser light, which is propagated in the fibers, so that the lenses are automatically positioned at the center of fiber cores. The lenses can be used at red to infrared wavelengths, and a minimal focal length is about 10 mum. (C) 2002 Elsevier Science B.V. All rights reserved.

DOI： 10.1016/S0022-3093(01)01063-8

Web of Science

researchmap

Language：Japanese   Publishing type：Research paper (scientific journal)  

researchmap

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：OPTICAL SOC AMER  

Convex microlenses of As2S3 glass have been fabricated on oxide-glass fiber ends by use of a photolithographic technique. As2S3 film evaporated on the end surface of an optical fiber is exposed to light through the opposite end surface, and the film etching is observed under a microscope. This process produces a lens that is automatically positioned on the fiber core. The As2S3 film possesses a high refractive index, which is favorable for production of microlenses with short focal lengths of similar to 10 mum. (C) 2000 Optical Society of America.

DOI： 10.1364/OL.25.001759

Web of Science

researchmap

Event date： 2023.11

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Event date： 2023.11

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Event date： 2023.11

Language：Japanese   Presentation type：Poster presentation  

researchmap

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Event date： 2023.9

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Event date： 2023.9

Language：English   Presentation type：Oral presentation (general)  

researchmap

Event date： 2023.9

Language：English   Presentation type：Oral presentation (general)  

researchmap

Event date： 2023.7

Language：English   Presentation type：Oral presentation (general)  

researchmap

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Event date： 2022.12

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Event date： 2022.12

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Event date： 2022.9

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Event date： 2022.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Hiroshima (online)   Country：Japan  

researchmap

Event date： 2022.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Hiroshima (online)   Country：Japan  

researchmap

Event date： 2022.3

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Event date： 2022.3

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Event date： 2022.1

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Event date： 2021.9

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Event date： 2020.3

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Poster presentation  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (invited, special)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Poster presentation  

researchmap

Language：Japanese   Presentation type：Poster presentation  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Poster presentation  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (invited, special)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Poster presentation  

researchmap

Language：English   Presentation type：Poster presentation  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Poster presentation  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (invited, special)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Poster presentation  

researchmap

Language：Japanese   Presentation type：Poster presentation  

researchmap

Language：Japanese  

researchmap

Language：Japanese   Presentation type：Poster presentation  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (invited, special)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Poster presentation  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (invited, special)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (invited, special)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Poster presentation  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (invited, special)  

researchmap

Language：English   Presentation type：Oral presentation (invited, special)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Poster presentation  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Poster presentation  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

researchmap

Language：Japanese   Presentation type：Poster presentation  

researchmap

Language：English   Presentation type：Oral presentation (keynote)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Poster presentation  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (invited, special)  

researchmap

Language：Japanese   Presentation type：Public lecture, seminar, tutorial, course, or other speech  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：English   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (invited, special)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (invited, special)  

researchmap

Language：Japanese   Presentation type：Oral presentation (general)  

researchmap

Language：Japanese   Presentation type：Oral presentation (invited, special)  

researchmap