Polarization Features of Light Diffraction on Reflective Holographic Phase Gratings in a Plane-Parallel Layer

Abstract

We studied the diffraction of light on reflection holographic gratings in a layer placed between the coating and the substrate with refractive indices different from the average refractive index of the layer. The significant differences between the reflection and transmission coefficients of the light diffracted on such a holographic grating with a change in the amplitude of the modulation of the refractive index of the layer, and the reflection and transmission coefficients of reflection gratings in matched structures are established. It is shown that at large widths of the layer with a reflection holographic grating a significant rotation of the polarization plane of the reflected and transmitted diffracted waves takes place when the modulation amplitude of the layer changes. It is due to the Fresnel reflection of light at the boundaries of the layer.