TY - JOUR
T1 - Silica-based glasses as photonic materials-second-order nonlinearity induced by UV-poling
AU - Ikushima, A. J.
AU - Fujiwara, T.
N1 - Funding Information:
The authors thank Kazuya Saito, Shuji Matsumto, Khaled Jabri, Motoshi O h m of Toyota Technological Institute for their collaborations since the beginning of this work. This work was partially supported by the New Energy and Industrial Technology Development Organization (NEDO)o f Japan.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2000
Y1 - 2000
N2 - After simultaneous applications of ultraviolet irradiation and a sufficiently high electric field, the so-called UV-poling, silica glass doped with germanium shows quite a large second-order optical nonlinearities in both bulk and film samples, and thus induced d coefficient is comparable to those of LiNbO3 crystal. The induced effect decays after the UV-poling with exactly a single exponential function of time, suggesting a kind of ordered structure formed in the glass by the UV-poling. The decay rate strongly indicates Ge-E′ centers to be relevant agents to the nonlinearity. The decay or degradation can be made much slower with addition of impurities as electron scavengers. Mechanism to give the nonlinearity will be discussed, relating to generation of crystallites in the glass.
AB - After simultaneous applications of ultraviolet irradiation and a sufficiently high electric field, the so-called UV-poling, silica glass doped with germanium shows quite a large second-order optical nonlinearities in both bulk and film samples, and thus induced d coefficient is comparable to those of LiNbO3 crystal. The induced effect decays after the UV-poling with exactly a single exponential function of time, suggesting a kind of ordered structure formed in the glass by the UV-poling. The decay rate strongly indicates Ge-E′ centers to be relevant agents to the nonlinearity. The decay or degradation can be made much slower with addition of impurities as electron scavengers. Mechanism to give the nonlinearity will be discussed, relating to generation of crystallites in the glass.
KW - Crystallization in glass
KW - Defects in glass
KW - Ge-E′ center
KW - Optical nonlinearity
KW - SHG (Second Harmonic Generation)
KW - Silica glass
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U2 - 10.1080/10587250008025684
DO - 10.1080/10587250008025684
M3 - Conference article
AN - SCOPUS:0034438654
VL - 353
SP - 499
EP - 511
JO - Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals
SN - 1542-1406
T2 - 5th International Conference on Frontiers of Polymers and Advanced Materials
Y2 - 21 June 1999 through 25 June 1999
ER -