Light diffraction on layers with harmonic modulation of dielectric function

Abstract

This master thesis deals with modeling of diffraction on grating with harmonically mod- ulated dielectric function. Such grating can arise from presence of a spin wave. For the understanding of grating calculation, the calculation for layered system is initially presented. Then the approximation of gratings using Fourier series is defined. Such ap- proach is called the Rigorous Coupled Wave Analysis - RCWA. Example of calculation for harmonic profile of dielectric function is shown. The correctness of this approach is discussed. Furthermore, the basics of magnonics, Brillouin light scattering and spin wave behavior are outlined. The final point of this thesis shows the model of reflectivity of Fe layer with magnonic wave.