title: Dual-band absorption of mid-infrared metamaterial absorber based on distinct dielectric spacing layers.
abstract: We present the simulation, fabrication, and characterization of a dual-band metamaterial absorber in the mid-infrared regime. Two pairs of circular-patterned metal-dielectric stacks are employed to excite the dual-band absorption peaks. Dielectric characteristics of the dielectric spacing layer determine energy dissipation in each resonant stack, i.e., dielectric or ohmic loss. By controlling material parameters, both two mechanisms are introduced into our structure. Up to 98% absorption is obtained at 9.03 and 13.32 μm in the simulation, which is in reasonable agreement with experimental results. The proposed structure holds promise for various applications, e.g., thermal radiation modulators and multicolor infrared focal plane arrays.
authors.affiliation: State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Zhang
authors.forename: Peiheng
authors.initials: P
authors.lastname: Zhou
authors.forename: Dengmu
authors.initials: D
authors.lastname: Cheng
authors.forename: Xiaolong
authors.initials: X
authors.lastname: Weng
authors.forename: Jianliang
authors.initials: J
authors.lastname: Xie
authors.forename: Longjiang
authors.initials: L
authors.lastname: Deng