GaAs periodic half octagonal cut based nano texturized hexagonal shaped nanopillar array structure for highly responsivephotodetector’s performance

Efficient light absorption is the most crucial factor for high spectral responsive photodetection phenomenon. Nanopillars constitute a great opportunity in enhancing efficiency along with reducing electrical cross-section of device. Here an analytical investigation proposed periodic GaAs material based half octagonal cut vertically oriented hexagonal nanopillar array deployed over 5um x front detector’s surface has been done attaining optimum absorbance by reflectivity incoming photons. The geometrical analysis model exhibits 0.999 and 0.97A/W photoresponsivity 86% EQE at 1um operating wavelength.