Volume 14 Issue 6
Nov.  2021
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FANG Xiao-min, JIANG Xiao-wei, WU Hua. Dual-wavelength narrow-bandwidth dielectric metamaterial absorber[J]. Chinese Optics, 2021, 14(6): 1327-1340. doi: 10.37188/CO.2021-0075
Citation: FANG Xiao-min, JIANG Xiao-wei, WU Hua. Dual-wavelength narrow-bandwidth dielectric metamaterial absorber[J]. Chinese Optics, 2021, 14(6): 1327-1340. doi: 10.37188/CO.2021-0075

Dual-wavelength narrow-bandwidth dielectric metamaterial absorber

doi: 10.37188/CO.2021-0075
Funds:  Supported by National Natural Science Foundation of China (No. 61575008, No. 61650404), Jiangxi Natural Science Foundation (No. 20171BAB202037), Technology Project of Jiangxi Provincial Education Department (No. GJJ170819), Quzhou Science and Technology Project (No. 2019K20)
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  • Author Bio:

    FANG Xiao-min (1985—), male, born in Quzhou, Zhejiang, master, associate professor. In 2010, he received a master's degree from China Jiliang University. His research focuses on metamaterials and optoelectronic devices. E-mail: zhjfangxiaomin@163.com

    JIANG Xiao-wei (1991—), male, born in Jiangshan, Zhejiang, master, lecturer. He received his master's degree from Beijing Institute of Technology in 2016, and since then he has focused on metamaterials and optoelectronic devices. Email: JosephJiangquzhi@126.com

    WU Hua (1980—), male, from Xiantao, Hubei, Ph.D., associate professor. After obtaining master's and doctoral degrees from Guangdong University of Technology and Beijing University of Technology in 2006 and 2015, he is mainly engaged in the research of micro-nano materials and semiconductor optoelectronic devices. Email: wh1125@126.com

  • Corresponding author: JosephJiangquzhi@126.com
  • Received Date: 13 Apr 2021
  • Rev Recd Date: 11 May 2021
  • Available Online: 11 Aug 2021
  • Publish Date: 19 Nov 2021
  • In order to reduce the manufacturing cost of the narrow-bandwidth Metamaterial Absorber (MA) and broaden its application field, a dual-wavelength dielectric narrow-bandwidth MA, composed of Au substrate, SiO2 dielectric layer and Si dielectric asymmetric grating, is designed based on the finite-difference time-domain method using dielectric materials. It is found by simulation that the proposed narrow-bandwidth MA has ultra-high absorption efficiency at λ1 = 1.20852 μm and λ2 = 1.23821 μm, and the FWHM is only 0.735 nm and 0.077 nm, respectively. The main principle that MA achieves the narrow-bandwidth absorption at λ1 is mainly due to the formation of Fabry-Pérot (FP) cavity resonance in the SiO2 layer, while the narrow-bandwidth absorption of MA at λ2 is mainly due to the guided mode resonance effect of the incident light in the asymmetric grating. The theoretical calculations show that the absorption characteristics can be affected more significantly by changing the structural parameters of the MA.

     

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