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Journal Articles Applied Physics Letters Year : 1997

Stable photorefractive memory effect in sol-gel materials

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Abstract

We report on the synthesis and the optical characterization of a photorefractive sol-gel material which contains nonlinear azo chromophore and carbazole charge transporting molecules. Both of these functional groups are covalently attached to the silica based backbone. Thin sol-gel films exhibit stable optically nonlinear properties: the electro-optic coefficient r13 measured at 633 nm is found to be 17 pm/V one day after corona poling and 15 pm/V after three weeks and over a period of several months. Photorefractivity is demonstrated by two beam coupling experiments without external applied electric field. Sol-gel films present a stable photorefractive memory effect with a net internal gain of 200 cm-1
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Dates and versions

hal-00668507 , version 1 (09-02-2012)

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Bruno Darracq, Michael Canva, Frédéric Chaput, Jean-Pierre Boilot, Didier Riehl, et al.. Stable photorefractive memory effect in sol-gel materials. Applied Physics Letters, 1997, 70 (3), pp.292-294. ⟨10.1063/1.118396⟩. ⟨hal-00668507⟩
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