Absorption 1 Absorption property 1 Absorption rates Broadband absorption 1 Complexes structure 1 Diffraction 1 Light trapping 1 Light-trapping 1 Nanowires 1 Optical resonators 1 Particle swarm optimization (PSO) 1 Silicon 1 Silicon nanowire arrays 1 Simple geometries 1 Solar absorbers 1 Solar cells 1 Stadium silicon nanowire 1 Stadium silicon nanowire (NW) 1 Ultra-thin 1 Ultra-thin solar cell 1 Ultra-thin solar cells (SCs) 1