Reflectance suppression of ZnO coated GaP nanowires

This paper reports on the optical properties of GaP nanowire (NW) arrays covered with thin nanocrystalline ZnO films. The GaP NWs were grown by metal organic vapour phase epitaxy from Au seeds created from a very thin Au layer deposited on top of a GaP substrate. ZnO films were deposited on the GaP nanowires by RF sputtering using different sputtering conditions. Reflectance of different ZnO covered GaP NW structures was measured. We experimentally show the reflectance suppression of ZnO coated NWs in the wide range of angles.