Fabrication of perfect plasmonic absorbers for blue and near-ultraviolet lights using double-layer wire-grid structures

Abstract This study proposes using double-layer wire-grid structures to create narrow-band, perfect plasmonic absorbers, which depend on polarization, for the short-wavelength visible and near-ultraviolet regions of electromagnetic spectrum. A rigorous coupled-wave analysis reveals that maximum absorption attained Ag Al is ~ 90% at 450 375 nm. Experiments yielded results similar those predicted by simulations. These demonstrate narrow-band can be realized nm or Al.