High selective absorption by a planar multilayer structure with two low absorbing materials in the core

Abstract

The necessary conditions are established for the thicknesses of two layers of the planar absorbing structure at which zero re(cid:29)ectance can be achieved. Using these conditions, a numerical procedure was developed for (cid:28)nding the thicknesses of three layers of the structure, which makes it possible to achieve close to zero values of the re(cid:29)ectance and transmittance for the chosen wavelength. This made it possible to propose a method for designing narrow-band absorbers based on such structures.