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Infrared Absorber Leveling in Ultra-Wideband by Using Hybrid Plasmonic Structure |
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| Authors: | Xing Yu Xu Zhong Zhu Liang Li Qin Xue Mei Su |
| Institution: | 1. Physics College, Jilin University, Changchun, 130012 P. R. China
State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin, 130033 China;2. College of Physics, Northeast Normal University of China, Changchun, 130024 P. R. China;3. State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin, 130033 China;4. Physics College, Jilin University, Changchun, 130012 P. R. China |
| Abstract: | In this paper, an effective ultra-broadband absorber in long-wavelength infrared is achieved by a metal-insulator-metasurface (MIM) stacked structure. This absorber exhibits an average absorption of 90% at wavelengths ranging from 8 to 14 µm and a maximum absorption rate of up to 97.1%. It is found that the performance is achieved by three mode combinations. The ultra-broadband leveling absorber is to be polarization-independent due to its geometrical symmetry. The absorption property can be controlled by the parameters of the triangle unit. It has great potential in many applications such as infrared detection and imaging. |
| Keywords: | infrared absorber metal metal-insulator plasmonic excitation waveguide cavity |