Contribution of the inverse flexoelectric effect to counterpropagating two-wave mixing of light beams in photorefractive crystals

摘要

This paper presents the results of a theoretical analysis of the contribution of the inverse flexoelectric and photoelastic effects to the photorefractive response that accompanies counterpropagating mixing of a steady-state reference wave with a phase-modulated signal wave on reflective holograms in samples of X-cut crystals of symmetry classes 23, 4?3m, 4?2m, 422, 622, 222, and 3m. Experimental studies of such mixing of waves with circular polarization of opposite signs in a Ba12TiO 20:Ni crystal made it possible to estimate its flexoelectric coefficient.