Optimization of second-order nonlinearity in UV-poled silica glass

Khaled, J.; Fujiwara, Takeshi; Ikushima, Akira J.

doi:10.1016/s0925-3467(01)00091-x

Cited by 7 publications

(1 citation statement)

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“…SHG was thus obtained in silica by thermal poling, corona poling, optical poling, UV laser poling and electron beam poling. [2][3][4][5][6][7][8] However, common feature of the results of poling treatments on silica is the reduced thicknessapproximately 10 µm -of the nonlinear layer generated by poling. In fact, in poled silica, the breaking of charge symmetry arises from migration of ionic charges towards the electrodes, 2, 9 and the final effect is mainly confined nearby the surfaces.…”

Section: Introductionmentioning

confidence: 99%

Second harmonic generation from bulk glassceramics containing laser-poled dielectric nanocrystals

et al. 2007

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Silica glass with SnO 2 nanocrystals, obtained from sol-gel synthesis and thermal densification at 1100 • C, was poled by means of a two-step process consisting of infrared 1064 nm laser irradiation followed by 532 nm laser exposure in high-voltage static electric field. Maker fringe experiments were then carried out at 1064 nm. The results show the formation of second-order nonlinearity with macroscopic nonlinear thickness (about 1 mm) and nonlinear susceptibility comparable with thermally poled silica (about 0.1 pm/V). Photoluminescence measurements suggest that mechanisms for this process should involve the activation and anisotropic ionization of defects at the interface between nanocrystals and glass.

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