• Chinese Optics Letters
  • Vol. 18, Issue 5, 052601 (2020)
Rong Tian1, Yi Li1、2、*, Zhimin Liu1, Jianzhong Zhou1, Jin Liu1, Lina Fan1, Wenqing Zhao1, Junxian Li1, Xin Zhang1, Chuang Peng1, Yuda Wu1, Xiaohua Wang1、3, and Baoying Fang1
Author Affiliations
  • 1School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • 2Shanghai Key Laboratory of Modern Optical System, Shanghai 200093, China
  • 3School of Electric and Information, Shanghai University of Electric Power, Shanghai 200090, China
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    DOI: 10.3788/COL202018.052601 Cite this Article Set citation alerts
    Rong Tian, Yi Li, Zhimin Liu, Jianzhong Zhou, Jin Liu, Lina Fan, Wenqing Zhao, Junxian Li, Xin Zhang, Chuang Peng, Yuda Wu, Xiaohua Wang, Baoying Fang. Broadband NIR absorber based on square lattice arrangement in metallic and dielectric state VO2[J]. Chinese Optics Letters, 2020, 18(5): 052601 Copy Citation Text show less

    Abstract

    In this Letter, we propose a broadband near-infrared (NIR) absorber based on the phase transition material VO2. By designing different arrangements of the VO2 square lattice at high and low temperatures on fused silica substrates, the absorption rate reaches more than 90% in the entire 1.4–2.4 μm range. Using a finite-difference time-domain simulation method and thermal field analysis, the results prove that the absorber is polarization-independent and has wide-angle absorption for incident angles of 0°–70°. The proposed absorber has a smoother absorption curve and is superior in performance, and it has many application prospects in remote sensing geology.
    R(ω)=|Z(ω)Z0Z(ω)+Z0|2,(1)

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    T(ω)=exp(2n2dω/c).(2)

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    RTE=|cosθμr1n2sinθ2cosθ+μr1n2sinθ2|2,(3)

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    RTM=|εrcosθμr1n2sinθ2εrcosθ+μr1n2sinθ2|2,(4)

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    Rong Tian, Yi Li, Zhimin Liu, Jianzhong Zhou, Jin Liu, Lina Fan, Wenqing Zhao, Junxian Li, Xin Zhang, Chuang Peng, Yuda Wu, Xiaohua Wang, Baoying Fang. Broadband NIR absorber based on square lattice arrangement in metallic and dielectric state VO2[J]. Chinese Optics Letters, 2020, 18(5): 052601
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