TY - JOUR
T1 - Formation of Ba2TiGe2O8 phase in BaO-TiO2-GeO2 glasses and their optical non-linearities
AU - Takahashi, Y.
AU - Saitoh, K.
AU - Benino, Y.
AU - Fujiwara, T.
AU - Komatsu, T.
N1 - Funding Information:
This work was supported by the 21st Century of Center of Excellence (COE) Program in Nagaoka University of Technology. The authors are grateful to Professor T. Yoko and Dr M. Takahashi, Kyoto University, for use of prism coupler technique.
PY - 2004/10/15
Y1 - 2004/10/15
N2 - Second-order optical non-linearities for the transparent Ba 2TiGe2O8 (BTG) crystallized glasses with the composition of 40BaO · 20TiO2 · 40GeO2 (BTG40), 33.3BaO · 16.7TiO2 · 50GeO2 (BTG50) and 30BaO · 15TiO2 · 55GeO2 (BTG55) have been examined. A very large d33 value for a transparent BTG crystallized glass in BTG55 was achieved, i.e., d33 = 22 ± 3 pm/V, being comparable to that of LiNbO3 single crystal. The d 33 for BTG50 and BTG40 were measured to be 12 ± 3 pm/V and 7 ± 2 pm/V, respectively. This result indicates that d33 decreases with GeO2 concentration, when approaching the glass composition of the stoichiometric BTG crystal. For a larger d33 value in BTG crystallized glasses, it is considered that the high homogeneity of the oriented surface Ba2TiGe2O8 crystalline layer on the crystallized BTG55 glass is accomplished by a suitable amount of benitoite phase of BaTiGe3O9, which acts a nucleation site for the BTG crystal.
AB - Second-order optical non-linearities for the transparent Ba 2TiGe2O8 (BTG) crystallized glasses with the composition of 40BaO · 20TiO2 · 40GeO2 (BTG40), 33.3BaO · 16.7TiO2 · 50GeO2 (BTG50) and 30BaO · 15TiO2 · 55GeO2 (BTG55) have been examined. A very large d33 value for a transparent BTG crystallized glass in BTG55 was achieved, i.e., d33 = 22 ± 3 pm/V, being comparable to that of LiNbO3 single crystal. The d 33 for BTG50 and BTG40 were measured to be 12 ± 3 pm/V and 7 ± 2 pm/V, respectively. This result indicates that d33 decreases with GeO2 concentration, when approaching the glass composition of the stoichiometric BTG crystal. For a larger d33 value in BTG crystallized glasses, it is considered that the high homogeneity of the oriented surface Ba2TiGe2O8 crystalline layer on the crystallized BTG55 glass is accomplished by a suitable amount of benitoite phase of BaTiGe3O9, which acts a nucleation site for the BTG crystal.
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U2 - 10.1016/j.jnoncrysol.2004.08.054
DO - 10.1016/j.jnoncrysol.2004.08.054
M3 - Conference article
AN - SCOPUS:9544227388
VL - 345-346
SP - 412
EP - 416
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
SN - 0022-3093
T2 - Physics of Non-Crystalline Solids 10
Y2 - 15 October 2004 through 15 October 2004
ER -