Broadband efficient light absorbing in the visible regime by a metananoring array

Authors

  • Shuiyan Cao,

    1. State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics & Physics, Chinese Academy of Sciences, Changchun, Jilin, P. R. China
    2. University of the Chinese Academy of Sciences, Beijing, P.R. China
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  • Weixing Yu,

    Corresponding author
    1. State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics & Physics, Chinese Academy of Sciences, Changchun, Jilin, P. R. China
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  • Lingtong Zhang,

    1. State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics & Physics, Chinese Academy of Sciences, Changchun, Jilin, P. R. China
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  • Cheng Wang,

    1. State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics & Physics, Chinese Academy of Sciences, Changchun, Jilin, P. R. China
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  • Xuming Zhang,

    1. Department of Applied Physics, Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
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  • Yongqi Fu

    1. School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, Sichuan Province, China
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Abstract

The broadband efficient light-absorbing property of a metamaterial-based subwavelength nanoring array in visible regime is reported. The nanoring array can absorb light efficiently with an average absorptivity of 0.97 over the whole visible waveband. In addition, it is found that this kind of super light-absorbing capability is independent of the incoming light polarization state and can maintain an average of 0.9 for an incident angle as large as ±60° under TM illumination. The perfect absorbing property of the metamaterial-based nanoring array is attributed to the synergetic effect of the Fabry–Perot resonance and the localized surface plasmon resonance enhancement.

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