中国物理B ›› 2018, Vol. 27 ›› Issue (2): 27302-027302.doi: 10.1088/1674-1056/27/2/027302

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

A transparent electromagnetic-shielding film based on one-dimensional metal-dielectric periodic structures

Ya-li Zhao(赵亚丽), Fu-hua Ma(马富花), Xu-feng Li(李旭峰), Jiang-jiang Ma(马江将), Kun Jia(贾琨), Xue-hong Wei(魏学红)   

  1. 1. College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China;
    2. Shanxi Key Laboratory of Electromagnetic Protection Technology, Taiyuan 030006, China;
    3. School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
  • 收稿日期:2017-10-16 修回日期:2017-11-27 出版日期:2018-02-05 发布日期:2018-02-05
  • 通讯作者: Xue-hong Wei E-mail:xhwei@sxu.edu.cn
  • 基金资助:
    Project supported by the International Science & Technology Cooperation Program of China (Grant No. 2014DFR10020) and the Science Foundation of Shanxi Province, China (Grant Nos. 201701D121050 and 201701D121007).

A transparent electromagnetic-shielding film based on one-dimensional metal-dielectric periodic structures

Ya-li Zhao(赵亚丽)1,2, Fu-hua Ma(马富花)2, Xu-feng Li(李旭峰)3, Jiang-jiang Ma(马江将)2, Kun Jia(贾琨)2, Xue-hong Wei(魏学红)1   

  1. 1. College of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China;
    2. Shanxi Key Laboratory of Electromagnetic Protection Technology, Taiyuan 030006, China;
    3. School of Applied Science, Taiyuan University of Science and Technology, Taiyuan 030024, China
  • Received:2017-10-16 Revised:2017-11-27 Online:2018-02-05 Published:2018-02-05
  • Contact: Xue-hong Wei E-mail:xhwei@sxu.edu.cn
  • About author:73.20.Mf; 07.07.Df; 02.60.Cb
  • Supported by:
    Project supported by the International Science & Technology Cooperation Program of China (Grant No. 2014DFR10020) and the Science Foundation of Shanxi Province, China (Grant Nos. 201701D121050 and 201701D121007).

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摘要： In this study, we designed and fabricated optical materials consisting of alternating ITO and Ag layers. This approach is considered to be a promising way to obtain a light-weight, ultrathin and transparent shielding medium, which not only transmits visible light but also inhibits the transmission of microwaves, despite the fact that the total thickness of the Ag film is much larger than the skin depth in the visible range and less than that in the microwave region. Theoretical results suggest that a high dielectric/metal thickness ratio can enhance the broadband and improve the transmittance in the optical range. Accordingly, the central wavelength was found to be red-shifted with increasing dielectric/metal thickness ratio. A physical mechanism behind the controlling transmission of visible light is also proposed. Meanwhile, the electromagnetic shielding effectiveness of the prepared structures was found to exceed 40 dB in the range from 0.1 GHz to 18 GHz, even reaching up to 70 dB at 0.1 GHz, which is far higher than that of a single ITO film of the same thickness.

关键词: transparent shields, electromagnetic shielding effectiveness, optical transmittance, metal-dielectric periodic structure

Abstract: In this study, we designed and fabricated optical materials consisting of alternating ITO and Ag layers. This approach is considered to be a promising way to obtain a light-weight, ultrathin and transparent shielding medium, which not only transmits visible light but also inhibits the transmission of microwaves, despite the fact that the total thickness of the Ag film is much larger than the skin depth in the visible range and less than that in the microwave region. Theoretical results suggest that a high dielectric/metal thickness ratio can enhance the broadband and improve the transmittance in the optical range. Accordingly, the central wavelength was found to be red-shifted with increasing dielectric/metal thickness ratio. A physical mechanism behind the controlling transmission of visible light is also proposed. Meanwhile, the electromagnetic shielding effectiveness of the prepared structures was found to exceed 40 dB in the range from 0.1 GHz to 18 GHz, even reaching up to 70 dB at 0.1 GHz, which is far higher than that of a single ITO film of the same thickness.

Key words: transparent shields, electromagnetic shielding effectiveness, optical transmittance, metal-dielectric periodic structure

中图分类号:  (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))

  • 73.20.Mf
07.07.Df (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing) 02.60.Cb (Numerical simulation; solution of equations)