title: Wide-angle polarization independent infrared broadband absorbers based on metallic multi-sized disk arrays.
abstract: Two-dimensional metallic broadband absorbers on a SiO(2)/Ag/Si substrate were experimentally studied. The absorptivity of such structure can be increased by tailoring the ratio of disk size to the unit cell area. The metallic disk exhibits a localized surface plasmon polariton (LSPP) mode for both TE and TM polarizations. A broadband thermal emitter can be realized because the LSPP mode is independent of the periodicities. By manipulating the ratios and disk sizes, a high-performance, wide-angle, polarization-independent dual band absorber was experimentally achieved. The results demonstrated a substantial flexibility in absorber designs for applications in thermal photovoltaics, sensors, and camouflage.
authors.affiliation: Department of Physics, National Taiwan University, Taipei 10617, Taiwan.
authors.forename: Cheng-Wen
authors.initials: CW
authors.lastname: Cheng
authors.forename: Mohammed Nadhim
authors.initials: MN
authors.lastname: Abbas
authors.forename: Chao-Wei
authors.initials: CW
authors.lastname: Chiu
authors.forename: Kun-Ting
authors.initials: KT
authors.lastname: Lai
authors.forename: Min-Hsiung
authors.initials: MH
authors.lastname: Shih
authors.forename: Yia-Chung
authors.initials: YC
authors.lastname: Chang
mesh_terms: D000042:Absorption; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007259:Infrared Rays; D012031:Refractometry / Q000295:instrumentation*; D012822:Silicon Dioxide / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*
chemical_list: D012834:Silver; D012822:Silicon Dioxide