Journal
OPTICS EXPRESS
Volume 20, Issue 9, Pages -Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.010376
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Funding
- National Science Council (NSC) of ROC, Taiwan [NSC-99-2112-M-001-033-MY3]
- Academia Sinica, Taiwan
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Two-dimensional metallic broadband absorbers on a SiO2/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. (C) 2012 Optical Society of America
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