In our work we propose a novel method of analysis of photorefractive transport equations. The method based on a perturbative approach can be used in the case of two wave mixing and four wave mixing geometry, i.e. for the samples illuminated by interference patterns. Presented approach can be employed for a broad range of material and experimental parameters, particularly for arbitrary depth of light modulation pattern. The approximate analytical solution is compared with results of numerical calculations and a good agreement practically in every case was found.
As reported by Ritchie, the fundamental optical excitations that are confined to a metal/dielectric interface are referred as the surface plasmon polaritons. In the present study, we report on a theoretical investigation of the dispersion relation of surface plasmon polaritons on the periodically corrugated surfaces. Tunability of these structures can be enhanced further changing the employed material.
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