New nonlinear Sol-Gel films exhibiting photorefractivity
- Ecole Polytechnique, Palaiseau (France); and others
The first photorefractive sol-gel film has been prepared by copolymerization of tetraethoxysilane and modified silane monomers having push-pull azobenzene and carbazole moieties. Thin films poled by corona discharge exhibited large quadratic nonlinearities (electrooptic coefficient r{sub 33}{approx} 17 pm/V, at 633 nm). Preliminary two-beam coupling measurements, without applying external electric field, showed photorefractivity of this new sol-gel material. 21 refs., 3 figs.
- OSTI ID:
- 369902
- Journal Information:
- Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 2 Vol. 8; ISSN CMATEX; ISSN 0897-4756
- Country of Publication:
- United States
- Language:
- English
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