TY - JOUR
T1 - Origin and properties of second-order optical non-linearity in ultraviolet-poled GeO2-SiO2 glass
AU - Fujiwara, Takumi
AU - Matsumoto, Syuji
AU - Ohama, Motoshi
AU - Ikushima, Akira J.
N1 - Funding Information:
The authors thank Drs K. Saito and K. Jabri of Toyota Technological Institute for fruitful discussions and cooperation. This work was partially supported by the New Energy and Industrial Technology Development Organization (NEDO) of Japan, and by the Grant-in Aid for Scientific Research from the Ministry of Education, Science, and Culture, Grant No. 11694179.
PY - 2000/8
Y1 - 2000/8
N2 - Progress in establishing larger second-order optical non-linearity in Ge-doped silica glass (15.7 GeO2-84.3 SiO2 in mol%) induced by simultaneous applications of a direct current (DC) electric field (≤ 105 V/cm) and ultraviolet laser irradiation (193 nm), the so-called the ultraviolet (UV)-poling method, is reported. The non-linearity thus induced has been shown to be affected by the GeE' centers created from oxygen deficient vacancies through photo-chemical reactions. In addition, we have found for the first time, to our knowledge, that crystallization in the glass is induced by the UV-poling, which leads to increase of third-order non-linearity, χ(3), approximately 15 times larger than that before UV-poling. Based on these results we suggest that origin of the second-order non-linearity in the glass induced by UV-poling is a combined effect of the third-order non-linearity possessed by the crystallites and an internal space-charge field where the charges are assumed to be produced during the formation of GeE′ centers.
AB - Progress in establishing larger second-order optical non-linearity in Ge-doped silica glass (15.7 GeO2-84.3 SiO2 in mol%) induced by simultaneous applications of a direct current (DC) electric field (≤ 105 V/cm) and ultraviolet laser irradiation (193 nm), the so-called the ultraviolet (UV)-poling method, is reported. The non-linearity thus induced has been shown to be affected by the GeE' centers created from oxygen deficient vacancies through photo-chemical reactions. In addition, we have found for the first time, to our knowledge, that crystallization in the glass is induced by the UV-poling, which leads to increase of third-order non-linearity, χ(3), approximately 15 times larger than that before UV-poling. Based on these results we suggest that origin of the second-order non-linearity in the glass induced by UV-poling is a combined effect of the third-order non-linearity possessed by the crystallites and an internal space-charge field where the charges are assumed to be produced during the formation of GeE′ centers.
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U2 - 10.1016/S0022-3093(00)00168-X
DO - 10.1016/S0022-3093(00)00168-X
M3 - Article
AN - SCOPUS:0002404140
VL - 273
SP - 203
EP - 208
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
SN - 0022-3093
IS - 1-3
ER -