期刊
JOURNAL OF OPTICS
卷 14, 期 8, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/14/8/085102
关键词
metamaterial absorber; dual-band; polarization insensitive; wide angle
类别
资金
- Chinese National Key Basic Research Special Fund [2011CB922003]
- National Natural Science Foundation of China [61008002, 91023041]
- National Basic Research Program of China [2009CB930502]
- Specialized Research Fund for the Doctoral Program of Higher Education [20100031120005]
- Fundamental Research Funds for the Central Universities [65012351, 65010801]
- 111 project [B07013]
We report the design, characterization, and experimental demonstration of an infrared dual-band metamaterial absorber composed of simple periodically patterned structures. Experimental results show that two distinct absorption peaks of 74% and 96% are obtained, which are in reasonable agreement with the simulations. We demonstrate two absorption resonances that are derived from the mixture of magnetic and electric plasmon resonances. The dual-band absorber is polarization insensitive and the absorption peaks remain high with large angles of incidence for both transverse electric and transverse magnetic polarizations, which provide more efficient absorptions for nonpolarized or oblique incident beams.
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