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- W4321262899 abstract "We have recently reported 1 on the formation of a large, stable second-order nonlinearity χ (2) ~ 1 μm/V) in the near surface region (~10 μm) of commercial fused silica materials by a modest temperature and electric field poling process. This nonlinearity is approximately 10 3 larger than that found in fibers and approaches the nonlinearity of LiNbO 3 . We have proposed a mechanism involving mobile-ion charge transport and trapping to create a large internal field that interacts with the material χ (3) to produce this large χ (2) nonlinearity. In this paper, we report time-resolved measurements of the formation and decay of the nonlinearity for a sample maintained at elevated temperatures (~300°C) while the applied electric field is switched on and off. The nonlinearity is probed by monitoring the second harmonic generation with a cw mode-locked YAG laser excitation source. The observed time dependence of the nonlinearity is consistent with an ionic charge transport process." @default.
- W4321262899 created "2023-02-18" @default.
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- W4321262899 date "1992-01-01" @default.
- W4321262899 modified "2023-09-27" @default.
- W4321262899 title "Dynamics of large χ(2) induced in SiO2 by temperature and electric field stress" @default.
- W4321262899 cites W1971528185 @default.
- W4321262899 doi "https://doi.org/10.1364/oam.1992.tup3" @default.
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