Wide-angle polarization independent infrared broadband absorbers based on metallic multi-sized disk arrays | Zendy

Cheng-Wen Cheng | Zendy; Mohammed Nadhim Abbas | Zendy; Chao-Wei Chiu | Zendy; Kun-Ting Lai | Zendy; MinHsiung Shih | Zendy; YiaChung Chang | Zendy

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Wide-angle polarization independent infrared broadband absorbers based on metallic multi-sized disk arrays

Author(s) -

Cheng-Wen Cheng,

Mohammed Nadhim Abbas,

Chao-Wei Chiu,

Kun-Ting Lai,

MinHsiung Shih,

YiaChung Chang

Publication year - 2012

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.20.010376

Subject(s) - materials science , optics , polarization (electrochemistry) , molar absorptivity , broadband , surface plasmon , optoelectronics , surface plasmon polariton , plasmon , infrared , thermal , chemistry , physics , meteorology

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.

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