期刊
APPLIED OPTICS
卷 55, 期 12, 页码 3176-3181出版社
OPTICAL SOC AMER
DOI: 10.1364/AO.55.003176
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资金
- Chinese National Key Basic Research Special Fund [2012CB921802, 2012CB933501]
- National Natural Science Foundation of China (NSFC) [61234004, 61321063, 91321312]
- Natural Science Foundation of Beijing [4142054]
- Aviation Science Foundation [20140136001]
We numerically investigate the triple-band perfect absorption in a metal-insulator-metal structure. The absorption peak from the TE-polarized guided-mode resonance (GMR) is highly sensitive to the incident angle. Thus a wavelength-tunable perfect absorber (PA) based on the TE GMR is proposed for the first time. By the precise control of the incident angle, the similar to 5 nm narrowband perfect absorber can be modulated linearly about 3 nm/degrees in our structure. For single frequency light, the intensity tunability of the absorption between 6.2%-99.27% is realized only by changing the incident angle of 5 degrees. The further study focused on TM polarization confirms the possibility to realize a polarization-independent wavelength-tunable PA. Such a PA possesses potential for applications in absorption filter, thermal emitter, surface-enhanced Raman scattering, biosensing, and nonlinear optics. (C) 2016 Optical Society of America
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