title: Triple-layer Fabry-Perot absorber with near-perfect absorption in visible and near-infrared regime.
abstract: A simple absorber design which enables near-perfect absorption in the visible and near-infrared regions is presented. The absorber is an unpatterned metal/dielectric/metal triple-layer, e.g., a 20 nm-thick metal film as the top layer, a 250 nm-thick dielectric film as the middle layer, and a 200 nm-thick metal film as the bottom layer. It was found that the high-efficiency absorption at specific wavelengths is mainly due to the Fabry-Perot (FP) resonances in the dielectric middle layer which result in trapping of the resonant light in the middle layer and thus enhanced absorption efficiency.
authors.forename: Shiwei
authors.initials: S
authors.lastname: Shu
authors.forename: Zhe
authors.initials: Z
authors.lastname: Li
authors.forename: Yang Yang
authors.initials: YY
authors.lastname: Li