Acousto-optical Diffraction in Multilayers

An algorithm was developed to evaluate acousto-optical diffraction in reflection and transmission by a system of isotropic, planar layers with some (or all) layers carrying acoustic waves. The algorithm combines an implementation of the multiple-beam method with the Fourier-optics based successive diffraction model. The former accounts for multiple internal reflections within the multilayer, the latter describes the acousto-optic diffraction. Test calculations in the weak-coupling Bragg-regime matched well with an analytical solution, both in intensity and phase.