GaAs-based photodetector with applied PDMS membrane with photonic crystal in the surface

In this paper we present GaAs-based photodiode with implemented polydimethylsiloxane (PDMS) membranes with patterned photonic crystal (PhC) structures on surface. Two-dimensional (2D) PhC surface relief structures of square symmetry were analyzed by atomic force microscope and optical effect of 2D PhC structure was investigated from goniophotometer photoresponse measurements. Spatial modulation of light coupling with square symmetry was documented for irradiation the GaAs-based photodiode with red light.