中国物理B ›› 2016, Vol. 25 ›› Issue (3): 37801-037801.doi: 10.1088/1674-1056/25/3/037801

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

Design of a multiband terahertz perfect absorber

Dan Hu(胡丹), Hong-yan Wang(王红燕), Zhen-jie Tang(汤振杰),Xi-wei Zhang(张希威), Lin Ju(鞠琳), Hua-ying Wang(王华英)   

  1. 1. College of Physics and Electrical Engineering, Anyang Normal University, Anyang 455000, China;
    2. College of Media and Communications, Anyang Normal University, Anyang 455000, China;
    3. College of Science, Hebei University of Engineering, Handan 056038, China
  • 收稿日期:2015-09-10 修回日期:2015-11-07 出版日期:2016-03-05 发布日期:2016-03-05
  • 通讯作者: Dan Hu, Hua-ying Wang E-mail:tylzhd@163.com;pbxsyingzi@126.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11504006), the Key Scientific Research Project of Higher Education of Henan Province, China (Grant No. 15A140002), and the Science and Technology Planning Project of Henan Province, China (Grant No. 142300410366).

Design of a multiband terahertz perfect absorber

Dan Hu(胡丹)1, Hong-yan Wang(王红燕)2, Zhen-jie Tang(汤振杰)1,Xi-wei Zhang(张希威)1, Lin Ju(鞠琳)1, Hua-ying Wang(王华英)3   

  1. 1. College of Physics and Electrical Engineering, Anyang Normal University, Anyang 455000, China;
    2. College of Media and Communications, Anyang Normal University, Anyang 455000, China;
    3. College of Science, Hebei University of Engineering, Handan 056038, China
  • Received:2015-09-10 Revised:2015-11-07 Online:2016-03-05 Published:2016-03-05
  • Contact: Dan Hu, Hua-ying Wang E-mail:tylzhd@163.com;pbxsyingzi@126.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11504006), the Key Scientific Research Project of Higher Education of Henan Province, China (Grant No. 15A140002), and the Science and Technology Planning Project of Henan Province, China (Grant No. 142300410366).

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摘要： A thin-flexible multiband terahertz metamaterial absorber (MA) has been investigated. Each unit cell of the MA consists of a simple metal structure, which includes the top metal resonator ring and the bottom metallic ground plane, separated by a thin-flexible dielectric spacer. Finite-difference time domain simulation indicates that this MA can achieve over 99% absorption at frequencies of 1.50 THz, 3.33 THz, and 5.40 THz by properly assembling the sandwiched structure. However, because of its asymmetric structure, the MA is polarization-sensitive and can tune the absorptivity of the second absorption peak by changing the incident polarization angle. The effect of the error of the structural parameters on the absorption efficiency is also carefully analyzed in detail to guide the fabrication. Moreover, the proposed MA exhibits high refractive-index sensing sensitivity, which has potential applications in multi-wavelength sensing in the terahertz region.

关键词: multiband, terahertz, electromagnetic resonance, metamaterial absorber

Abstract: A thin-flexible multiband terahertz metamaterial absorber (MA) has been investigated. Each unit cell of the MA consists of a simple metal structure, which includes the top metal resonator ring and the bottom metallic ground plane, separated by a thin-flexible dielectric spacer. Finite-difference time domain simulation indicates that this MA can achieve over 99% absorption at frequencies of 1.50 THz, 3.33 THz, and 5.40 THz by properly assembling the sandwiched structure. However, because of its asymmetric structure, the MA is polarization-sensitive and can tune the absorptivity of the second absorption peak by changing the incident polarization angle. The effect of the error of the structural parameters on the absorption efficiency is also carefully analyzed in detail to guide the fabrication. Moreover, the proposed MA exhibits high refractive-index sensing sensitivity, which has potential applications in multi-wavelength sensing in the terahertz region.

Key words: multiband, terahertz, electromagnetic resonance, metamaterial absorber

中图分类号:  (Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))

  • 78.20.Ci
41.20.Jb (Electromagnetic wave propagation; radiowave propagation)