Design and Analyses of Broadband Perfect Light Absorber for Visible and Near IR Frequencies using Plasmonic Metamaterials

Abstract

Abstract Metal-insulator-metal nanostructures based plasmonic metamaterials have been extensively explored for the design of broadband perfect light absorption in all the technologically relevant windows of electromagnetic spectrum. We have computationally studied a unique metal-insulator-metal nanostructure for the design of a broadband perfect light absorber in the visible and near infrared frequencies. We explored different metal combinations for the same metal-insulator-metal geometry for the absorber design. The study shows that the dependence of spectral response is dominated by the geometrical shape and arrangement, rather than the nature of the metal combinations. We report an average light absorption of more than 80% from 400nm to 1100nm wavelength range.