Self-diffraction of light waves by a nonlocal photorefractive grating in a crystal with the $$\bar 43m$$ symmetry
| Autor: | R. V. Litvinov |
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| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Journal of Experimental and Theoretical Physics. 95:820-832 |
| ISSN: | 1090-6509 1063-7761 |
| Popis: | A frequency-degenerate steady-state two-wave interaction on a dynamic transmitting phase grating formed in a cubic crystal of the $$\bar 43m$$ symmetry group with a nonlocal photorefractive response is considered in the paraxial approximation. The conservation laws for the nonlinear system of equations of coupled waves, derived for an arbitrary orientation of interaction relative to the crystallographic axes and the polarization of incident light waves, indicate that the contribution to energy exchange between the interacting waves may come from fluxes in different directions. The possibility of nonunidirectional energy pumping from one wave to the other upon a change in their polarization state due to the interaction is demonstrated. For the transverse configuration of the interaction and linear polarization of incident waves, explicit analytic expressions for the scalar amplitudes of the orthogonal components of the light field are derived in the linear approximation in the coefficient of modulation of the interference pattern of light. The possibility of rotation of the polarization planes of light waves without a change in their intensity is demonstrated. For three particular configurations, the dependence of the efficiency of interaction of linearly polarized waves on the reduced length, orientation of the polarization vectors of the incident light waves, and the ratio of their intensities are analyzed. |
| Databáze: | OpenAIRE |
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