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Dual-wavelength narrow-bandwidth dielectric metamaterial absorber

FANG Xiao-min JIANG Xiao-wei WU Hua

方晓敏, 江孝伟, 武华. 双波长窄带宽介质超材料吸收器[J]. 中国光学(中英文), 2021, 14(6): 1327-1340. doi: 10.37188/CO.2021-0075
引用本文: 方晓敏, 江孝伟, 武华. 双波长窄带宽介质超材料吸收器[J]. 中国光学(中英文), 2021, 14(6): 1327-1340. doi: 10.37188/CO.2021-0075
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

双波长窄带宽介质超材料吸收器

详细信息
  • 中图分类号: TN256

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)
More Information
    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
  • 摘要: 为降低窄带宽超材料吸收器(Metamaterial Absorber,MA)制造成本的同时拓宽其应用领域,本文基于时域有限差分法利用介质材料设计出双波长窄带宽介质MA,其由Au衬底、SiO2介质层和Si介质非对称光栅构成。经模拟计算发现,本文提出的双波长窄带宽介质MA在λ1=1.20852 μm和λ2=1.23821 μm具有超高吸收效率,而且FWHM也分别只有0.735 nm和0.077 nm。MA在λ1实现窄带宽吸收主要是因为光在SiO2层形成了法布里-珀罗(Fabry-Pérot, FP)腔共振,而MA在λ2实现窄带宽吸收主要是由于入射光在介质非对称光栅中形成了导模共振效应。经理论计算可知,通过改变MA的结构参数可对其吸收特性产生较为显著的影响。

     

  • 图 1  双波长窄带宽介质MA结构图

    Figure 1.  Dual-wavelength narrow-bandwidth dielectric MA structure diagram

    图 2  双波长窄带宽介质MA吸收光谱

    Figure 2.  Absorption spectroscopy of dual-wavelength narrow-bandwidth dielectric MA

    图 3  介质MA的有效阻抗。(a)阻抗实部;(b)阻抗虚部

    Figure 3.  Effective impedance of dielectric MA. (a) Real part of impedance; (b) imaginary part of impedance

    图 4  双波长窄带宽介质MA在不同波长处的电场分布。(a)λ1;(b)λ2

    Figure 4.  Electric field distribution of dual-wavelength narrow-bandwidth dielectric MA at different wavelengths. (a) λ1; (b) λ2

    图 5  t对双波长窄带宽介质MA吸收特性的影响。(a)吸收光谱;(b)吸收波长

    Figure 5.  Effect of t on the absorption characteristics of the dual-wavelength narrow-bandwidth dielectric MA. (a) Absorption spectra; (b) absorption wavelength

    图 6  t=1.205 μm时MA在波长λ2处的电场分布

    Figure 6.  Electric field distribution of MA at wavelength λ2 when t = 1.205 μm

    图 7  W1对双波长窄带宽介质MA吸收特性的影响。(a)吸收光谱;(b)吸收波长

    Figure 7.  Effect of W1 on the absorption characteristics of the dual-wavelength narrow-bandwidth dielectric MA. (a) Absorption spectra; (b) absorption wavelength

    图 8  W1neq的影响

    Figure 8.  Effect of W1 on neq

    图 9  n对双波长窄带宽介质MA吸收特性的影响。(a)吸收光谱;(b)吸收波长

    Figure 9.  Effect of n on the absorption characteristics of the dual-wavelength narrow-bandwidth dielectric MA. (a) Absorption spectra; (b) absorption wavelength

    图 10  P对双波长窄带宽介质MA吸收特性的影响

    Figure 10.  Effect of P on the absorption characteristics of the dual-wavelength narrow-bandwidth dielectric MA

    图 11  PΦ的影响

    Figure 11.  Effect of P on Φ

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出版历程
  • 收稿日期:  2021-04-13
  • 修回日期:  2021-05-11
  • 网络出版日期:  2021-08-11
  • 刊出日期:  2021-11-19

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