中国物理B ›› 2011, Vol. 20 ›› Issue (3): 37801-037801.doi: 10.1088/1674-1056/20/3/037801

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A metamaterial absorber with direction-selective and polarisation-insensitive properties

徐卓1, 顾超2, 裴志斌2, 屈绍波3   

  1. (1)Electronic Materials Research Laboratory, Key Laboratory of Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, China; (2)The College of Science, Air Force Engineering University, Xi'an 710051, China; (3)The College of Science, Air Force Engineering University, Xi'an 710051, China;Electronic Materials Research Laboratory, Key Laboratory of Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, China
  • 收稿日期:2010-05-10 修回日期:2010-07-12 出版日期:2011-03-15 发布日期:2011-03-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 50632030, 60871027, 60901029 and 61071058), in part by the 973 Project of Science and Technology Ministry of China (Grant No. 2009CB623306) and the Shaanxi Provincial Synthe

A metamaterial absorber with direction-selective and polarisation-insensitive properties

Gu Chao(顾超)a),Qu Shao-Bo(屈绍波)a)b)†, Pei Zhi-Bin(裴志斌)a),and Xu Zhuo(徐卓)b)   

  1. a The College of Science, Air Force Engineering University, Xi'an 710051, China; b  Electronic Materials Research Laboratory, Key Laboratory of Ministry of Education, Xi'an Jiaotong University, Xi'an 710049, China
  • Received:2010-05-10 Revised:2010-07-12 Online:2011-03-15 Published:2011-03-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 50632030, 60871027, 60901029 and 61071058), in part by the 973 Project of Science and Technology Ministry of China (Grant No. 2009CB623306) and the Shaanxi Provincial Synthetic Electronic Information System Foundation, China (Grant No. 200905A).

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摘要： This paper reports the design of a metamaterial absorber with direction-selective and polarisation-insensitive property. Both theoretical and simulated results reveal that the absorber has a distinct absorption point with direction selectivity at 7.48 GHz, which is related to the resonance of the metamaterial and is not influenced by the polarisation. The retrieved impedance indicates that the impedance of the absorber can be tuned to approximatively match the impedance of the free space on one side and not to match the impedance of the free space on the other side. This design can result in the minimal reflectance, the minimal transmission and the highest absorbance at the absorption frequency. The distribution of the power loss indicates that the absorber is an excellent electromagnetic wave collector: the wave is first trapped and reinforced in certain specific locations, and then mostly consumed. The distribution of the surface current is consistent with the design, the retrieved impedance and the distribution of the power loss. This absorber may have applications in many scientific and technological areas.

关键词: metamaterial absorber, direction-selective, polarisation-insensitive

Abstract: This paper reports the design of a metamaterial absorber with direction-selective and polarisation-insensitive property. Both theoretical and simulated results reveal that the absorber has a distinct absorption point with direction selectivity at 7.48 GHz, which is related to the resonance of the metamaterial and is not influenced by the polarisation. The retrieved impedance indicates that the impedance of the absorber can be tuned to approximatively match the impedance of the free space on one side and not to match the impedance of the free space on the other side. This design can result in the minimal reflectance, the minimal transmission and the highest absorbance at the absorption frequency. The distribution of the power loss indicates that the absorber is an excellent electromagnetic wave collector: the wave is first trapped and reinforced in certain specific locations, and then mostly consumed. The distribution of the surface current is consistent with the design, the retrieved impedance and the distribution of the power loss. This absorber may have applications in many scientific and technological areas.

Key words: metamaterial absorber, direction-selective, polarisation-insensitive

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)