Faculty Profiles - BENINO Yasuhiko

Papers - BENINO Yasuhiko

Division display 81 - 100 of about 141 ／ All the affair displays >>

Micro-Raman and photoluminescence spectra of Sm3+-doped b-BaB2O4 crystal lines written by YAG laser irradiation in glass

T. Honma, *Y. Benino, T. Fujiwara, R. Sato and T. Komatsu

J. Phys. Chem. Solids 2004.10

Spatially selected crystallization in glass by YAG laser irradiation

T. Honma, *Y. Benino, T. Fujiwara, R. Sato and T. Komatsu

J. Non-Cryst. Solids 2004.10

Formation of Ba2TiGe2O8 phase in BaO-TiO2-GeO2 glasses and their optical nonlinearities

Y. Takahashi, K. Saitoh, *Y. Benino, T. Fujiwara and T. Komatsu

J. Non-Cryst. Solids 2004.10

Micro-Raman and photoluminescence spectra of Sm3+-doped β-BaB2O4 crystal lines written by YAG laser irradiation in glass

T. Honma, Y. Benino, T. Fujiwara, R. Sato, T. Komatsu

Journal of Physics and Chemistry of Solids 65 ( 10 ) 1705 - 1710 2004.10

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

Nonlinear optical β-BaB2O4 (β-BBO) crystal straight lines are written in 10Sm2O 3·40BaO·50B2O3 glass by irradiation of a continuous wave Nd:YAG laser operating at 1064 nm. The linearly polarized micro-Raman scattering spectra for β-BBO crystal lines are consistent with those for commercially available y-cut β-BBO bulk single-crystals, supporting that β-BBO crystal straight lines with the c-axis orientation along the YAG laser scanning direction might be single-crystals. The photoluminescence spectra with large intensities and Stark splitting are observed for β-BBO crystal lines, and it is concluded that some amounts of Sm3+ ions in the glass are incorporated into β-BBO crystal lines. Two-dimensional β-BBO crystal curved lines with a bending angle of 30° are successfully written in 10Sm2O 3·42BaO·48B2O3 glass. © 2004 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.jpcs.2004.04.010

Scopus

researchmap

Formation of nonlinear optical KSm(PO3)4 crystals in phosphate glasses by YAG laser irradiation

M. Saito, T. Honma, *Y. Benino, T. Fujiwara and T. Komatsu

Solid Stat. Sci. 2004.9

Judd-Ofelt parameters of Er3+ in transparent TeO2-based nanocrystallized glasses

K. Naito, Y. Benino, T. Fujiwara and T. Komatsu

Solid Stat. Commun. 2004.8

Evaluation of elastic/mechanical properties of some glasses and nanocrystallized glass by cube resonance and nanoindentation methods

F. Torres, *Y. Benino, T. Fujiwara and T. Komatsu

Mater. Res. Bull. 2004.8

Photonic crystallized structures in glass

T. Fujiwara, T. Honma, Y. Takahashi, *Y. Benino, R. Sato and T. Komatsu

J. Ceram. Soc. Jpn. 2004.5

Stoichiometric crystallized glasses with large second-order optical nonlinearities

Y. Takahashi, K. Saitoh, *Y. Benino, T. Fujiwara T. Komatsu

J. Ceram. Soc. Jpn. 2004.5

Writing of nonlinear optical single crystal-lines in glass by scanning YAG laser scanning

T. Honma, *Y. Benino, T. Fujiwara, R. Sato and T. Komatsu

J. Ceram. Soc. Jpn. 2004.5

Effect of stress on second harmonic generation in TeO2-based glass ceramics

Y. Miyashita, T. Matsuzaki, Y. Mutoh, Y. Takahashi, *Y. Benino and T. Komatsu

J. Ceram. Soc. Jpn. 2004.5

Temperature dependence of second-order optical nonlinearity in crystallized (Sr,Ba)2TiGe2O8 glasses

K. Saitoh, Y. Takahashi, *Y. Benino, T. Fujiwara and T. Komatsu

J. Ceram. Soc. Jpn. 2004.5

Unique crystallization and formation of nonlinear optical (Na,K)NbO3 phases in (Na,K)NbGeO5 glasses

K. Narita, Y. Takahashi, *Y. Benino, T. Fujiwara and T. Komatsu

Opt. Mater. 2004.5

Writing of crystalline dots and lines in Sm2O3 doped borate and tellurite glasses by YAG laser irradiation and their optical properties

T. Komatsu, S. Kawasaki, T. Honma, *Y. Benino, T. Fujiwara and R. Sato

Phys. Chem. Glasses (Proc. VII Symp. on Crystallization and Liquids, Sheffield, 6-9 July 2003) 2004.4

Large second-order optical nonlinearities of fresnoite-type crystals in transparent surface-crystallized glasses

Y. Takahashi, *Y. Benino, T. Fujiwara and T. Komatsu

J. Appl. Phys. 2004.4

Formation of Langasite-Type Crystals in Corresponding Glasses and Their Second-Order Optical Nonlinearities

TAKAHASHI Yoshihiro, SAITOH Kenta, BENINO Yasuhiko, FUJIWARA Takumi, KOMATSU Takayuki

Journal of the Ceramic Society of Japan 112 ( 1301 ) 61 - 64 2004.1

Language：English Publisher：The Ceramic Society of Japan

Second-order optical nonlinearities for the langasite-type phases obtained by crystallization of corresponding glasses are clarified for the first time. It is confirmed that most of langasite-type crystalline phases can be formed by crystallization in the corresponding glasses without introducting of any impurity phases, e.g., the glasses with the stoichiometric composition of Ba_3Ga_2Ge_4O_<14>, BaGa_4La_2Ge_2O_<14>, Pb_3Ga_2Ge_4O_<14>, etc. We find that Pb_3Ga_2Ge_4O_<14> and Pb_3AlGaGe_4O_<14> phases exhibited strong second-harmonic intensities of approximately 100 times as large as α-quartz by means of a powder technique, demonstrating that those langasite-type crystals are excellent nonlinear optical materials. It is also suggested that the octahedral site is one of keys for second-order optical nonlinearity in langasite-type crystals.

DOI： 10.2109/jcersj.112.61

CiNii Article

CiNii Books

researchmap

Other Link： https://jlc.jst.go.jp/DN/JALC/00234255955?from=CiNii

Prominent nanocrystallization of 25K2O-25Nb2O5-50GeO2 glass

K. Narita, Y. Takahashi, *Y. Benino, T. Fujiwara, T. Komatsu, T. Hanada and Y. Hirotsu

J. Am. Ceram. Soc. 2004.1

Prominent nanocrystallization of 25K(2)O center dot 25Nb(2)O(5)center dot 50GeO(2) glass

K Narita, Y Takahashi, Y Benino, T Fujiwara, T Komatsu, T Hanada, Y Hirotsu

JOURNAL OF THE AMERICAN CERAMIC SOCIETY 87 ( 1 ) 113 - 118 2004.1

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

Some K2O-Nb2O5-GeO2 glasses are prepared, and their crystallization behaviors are examined. 25K(2)O.25Nb(2)O(5).50GeO(2) glass with the glass transition temperature T-g = 622degreesC and crystallization onset temperature T-x = 668degreesC shows a prominent nanocrystallization. The crystalline phase is K3.8Nb5Ge3O20.4 with an orthorhombic structure. The sizes of crystals in the crystallized glasses heat-treated at 630degrees and 720degreesC for 1 h are similar to10 and 20-30 nm, respectively, and the crystallized glasses obtained by heat treatments at 620degrees-850degreesC for 1 h maintain good transparency. The density of crystallized glasses increases gradually with increasing heat-treatment temperature, and the volume fraction of crystals in the sample heat-treated at 630degreesC for 1 h is estimated to be similar to35%. The usual Vickers hardness and Martens hardness (estimated by nanoindentation) of 25K(2)O.25Nb(2)O(5).50GeO(2) glass change steeply by heat treatment at T-g, i.e., at around 35% volume fraction of nanocrystals. The present study demonstrates that the composite of nanocrystals and the glassy phase has a strong resistance against deformation during Vickers indenter loading in crystallized glasses.

DOI： 10.1111/j.1551-2916.2004.00113.x

Web of Science

researchmap

Photo-induced structure ordering in catallized glass from nano-particles to single-crystal patterning Reviewed

T Fujiwara, S Mizuno, T Honma, Y Benino, T Komatsu, R Sato

FIFTH INTERNATIONAL SYMPOSIUM ON LASER PRECISION MICROFABRICATION 5662 24 - 29 2004

Language：English Publishing type：Research paper (international conference proceedings) Publisher：SPIE-INT SOC OPTICAL ENGINEERING

Challenges for laser-induced structure ordering from nano-particles to single-crystal patterning in glasses are described. Transparent crystallization in glass must be the best material solution to obtain novel functional glasses with a permanent second-order optical nonlinearity. We focus on the new functions created by structure ordering in glass by means of laser micro-fabrication for space-selected crystallization. Two topics in our recent experimental results of laser-induced structure ordering in glass will be presented as follows: 1) UV-laser induced structure ordering of nano-particles in tellurite-based glasses and possible photonic integrated circuits with innovative minute scale. 2) Single crystalline patterning by atom heat laser processing in Sm-doped glasses for optical waveguides with second-order nonlinearity.

DOI： 10.1117/12.595719

Web of Science

researchmap

Origin of intrinsic second-harmonic generation in crystallized GeO2-SiO2 glass films Reviewed

T Fujiwara, T Sawada, T Honma, Y Benino, T Komatsu, M Takahashi, T Yoko, J Nishi

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS 42 ( 12 ) 7326 - 7330 2003.12

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

The origin, and properties of second-harmonic generation (SHG) from crystalline particles and their crystalline phases in GeO2-SiO2 glass films were investigated. GeO2-SiO2 glass films with a thickness of approximately 5 pin were fabricated by the chemical vapor-phase deposition (CVD) method. Heat treatments in the temperature range of 1100-1260degreesC for durations of 2-8 h have been performed to crystallize the glass films. X-ray diffraction (XRD) peaks at around 2theta = 22degrees in the crystallized GeO2-SiO2 films were observed, and the obtained XRD patterns in the glass films are exactly the same as those in ultraviolet (UV) poled GeO2-SiO2 glasses with a large second-order, optical nonlinearity comparable to that in LiNbO3 crystals. Using a SHG microscopic technique, it has been found that the intensity of SHG emission from crystalline particles is clearly dependent on stress-induced optical retardation which is accompanied by the formation of crystalline particles of the pseudo-beta-cristobalite containing GeO2. In addition, a new technique for enhancing the intrinsic SHG by means of modification of defect states is demonstrated.

DOI： 10.1143/JJAP.42.7326

Web of Science

researchmap

　 PREV - NEXT 　

< BENINO Yasuhiko >

Papers - BENINO Yasuhiko