Epsilon-near-zero thin-film metamaterials for wideband near-perfect light absorption

Absorptive metamaterials made of epsilon-near-zero indium tin oxide and silicon dioxide films are designed and fabricated for wideband perfect light absorption near the epsilon-near-zero wavelength. By increasing the number of bilayers, we achieve over 90%) absorption in a spectral bandwidth of 0.95 microns. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement