Numerical study of a tungsten twin-cross-grating-based solar selective absorber
Received:March 08, 2019  Revised:July 14, 2019  download
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Author NameAffiliationE-mail
ZHANG Jing-Ru Department of Optical Science and Engineering, Fudan University, Shanghai, 200433,China zjr90@126.com 
TU Hua-Tian Department of Optical Science and Engineering, Fudan University, Shanghai, 200433,China  
ZANG Kai-Yan Department of Optical Science and Engineering, Fudan University, Shanghai, 200433,China  
HU Er-Tao College of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing 210023, China  
ZHANG Rong-Jun Department of Optical Science and Engineering, Fudan University, Shanghai, 200433,China  
ZHENG Yu-Xiang Department of Optical Science and Engineering, Fudan University, Shanghai, 200433,China  
WANG Song-You Department of Optical Science and Engineering, Fudan University, Shanghai, 200433,China  
ZHAO Hai-Bin Department of Optical Science and Engineering, Fudan University, Shanghai, 200433,China  
YANG Yue-Mei Department of Optical Science and Engineering, Fudan University, Shanghai, 200433,China  
CHEN Liang-Yao Department of Optical Science and Engineering, Fudan University, Shanghai, 200433,China lychen@fudan.ac.cn 
Abstract:Based on the six-layered metal/dielectric film structure, a new 2D tungsten twin-cross-grating-based solar selective absorber (SSA) has been proposed to improve the optical absorption in the solar radiation region. The weighted average absorptivity before the cut-off wavelength is about 96.5%, and the calculated emissivity at 850 K is about 0.086. The mechanisms of high absorption in the solar region have been further analyzed by field intensity distribution in the SSA structure. The absorber also has the feature to be less polarization-dependent and broad angular-independent up to 50°, which satisfies the required conditions of the SSA device in applications.
keywords:solar selective absorber  photonic crystal absorbers  high absorption  low emittance
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