Room temperature aging of the χ(2) susceptibility induced in silica glasses by thermal poling

Kudlinski, Alexandre; Quiquempois, Yves; Martinelli, Gilbert
April 2005
Applied Physics Letters;4/18/2005, Vol. 86 Issue 16, p161909
Academic Journal
The stability of the χ(2) susceptibility induced in poled Infrasil™ silica glass samples is studied at room temperature. To this end, the second-order nonlinearity spatial distribution is determined as a function of the aging duration ranging from 0 (immediately after poling) to 14 months. An important decrease of the nonlinear layer width is observed although the χ(2) magnitude remains unaffected. The experimental results reported in this Letter suggest a movement of charges within the nonlinear region without recombination.


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