Localized surface plasmon resonance based tunable dual-band absorber within 1-10 μm
投稿时间:2019-02-04  修订日期:2019-09-27  download
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作者单位邮编
YU Wei-Wei State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China
University of Chinese Academy of Sciences, Beijing 100049, China 
100049
LU Yue  
PENG Fang  
PAN Xiao-Hang State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China 
SUN Yan  
HAO Jiao-Ming State Key Laboratory of Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China 
CHEN Xin  
DAI Ning  
Abstract:The sub-wavelength artificial metamaterials which demonbstrate nearly-perfect absorption of a specific wavelength can overcome the defects of low absorption efficiency, large thickness, and working wavelength limitation of band gap in the infrared photoelectric device application. In this paper, a metal/medium/metal structure is used to construct a sub-wavelength structure that can be prepared over a large area, which can achieve dual-band infrared perfect absorption in the 1-10 μm band. Through analyzing the results of Finite-Difference Time-Domain simulation and experiment, we believe that the high-frequency absorption peak of the absorber is mainly derived from FP resonance interference enhanced absorption; while the absorption peak in the low-frequency infrared band is mainly due to the excitation of the electric dipole resonance and the magnetic resonance mode. By adjusting the size of the upper layer of gold particles in the way of annealing, the positions of the two absorption peaks can be effectively regulated.
keywords:metamaterials  nearly perfect infrared absorption  localized surface plasmons resonance
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Copyright:《Journal of Infrared And Millimeter Waves》