期刊
OPTICS EXPRESS
卷 22, 期 5, 页码 A335-A343出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.22.00A335
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资金
- National Natural Science Foundation of China [11004041, 51306043, 51121004]
An infrared dual-band perfect absorber based on asymmetric T-shaped plasmonic array is designed and numerically investigated. Two distinct absorption peaks are achieved by localized surface plasmon polariton (LSPP) mode over a wide incident angular range. Both the absorption peaks can be finely tuned independently by varying the geometry of the structure. In our proposed structure, the period of the T-shaped structures becomes less and the multiple LSPP peaks are suppressed, which result in the sideband of absorption peaks very low. This dual-band perfect absorber has potential applications such as in infrared imaging devices, thermal bolometers, and wavelength selective radiators. (C)2014 Optical Society of America
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