Off-axis Talbot effect and array generation in planar optics

Recently, planar optics was introduced as a concept for the micro integration of free space optics1. For the planar optics approach passive optical elements are arranged on the surface of a thick transparent substrate. The light signal travels within the substrate along a folded zigzag path, reflected at the surfaces of the substrate. Since planar optics was first proposed, various applications were successfully demonstrated, like integrated split and shift modules2 or integrated optical imaging systems3.