Dipolar holographic gratings induced by the photorefractive process in potassium lithium tantalate niobate at the paraelectric phase
| Autor: | Aharon J. Agranat, Michal Balberg, Victor Leyva, Meir Razvag |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Materials science
Birefringence Kerr effect Condensed matter physics business.industry Physics::Optics Statistical and Nonlinear Physics Photorefractive effect Dielectric Diffraction efficiency Atomic and Molecular Physics and Optics chemistry.chemical_compound Light intensity Optics chemistry Lithium tantalate Physics::Atomic Physics business Refractive index |
| Zdroj: | Journal of the Optical Society of America B. 14:2043 |
| ISSN: | 1520-8540 0740-3224 |
| DOI: | 10.1364/josab.14.002043 |
| Popis: | We present experimental evidence indicating the formation of dipolar holographic gratings in potassium lithium tantalate niobate at the paraelectric phase slightly above the phase transition. These gratings are formed in the dark, following the writing of space-charge-based photorefractive gratings, under an external electric field. The dipolar gratings create a spatial modulation of the low-frequency dielectric constant, and the latter induces a spatially correlated modulation of the polarization, which is transformed into birefringence gratings through the quadratic electro-optic effect. |
| Databáze: | OpenAIRE |
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