ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Achieving a multi-band metamaterial perfect absorber via a hexagonal ring dielectric resonator |
Li Li-Yang (李立扬), Wang Jun (王军), Du Hong-Liang (杜红亮), Wang Jia-Fu (王甲富), Qu Shao-Bo (屈绍波) |
College of Science, Air Force Engineering University, Xi'an 710051, China |
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Abstract A multi-band absorber composed of high-permittivity hexagonal ring dielectric resonators and a metallic ground plate is designed in the microwave band. Near-unity absorptions around 9.785 GHz, 11.525 GHz, and 12.37 GHz are observed for this metamaterial absorber. The dielectric hexagonal ring resonator is made of microwave ceramics with high permittivity and low loss. The mechanism for the near-unity absorption is investigated via the dielectric resonator theory. It is found that the absorption results from electric and magnetic resonances where enhanced electromagnetic fields are excited inside the dielectric resonator. In addition, the resonance modes of the hexagonal resonator are similar to those of standard rectangle resonators and can be used for analyzing hexagonal absorbers. Our work provides a new research method as well as a solid foundation for designing and analyzing dielectric metamaterial absorbers with complex shapes.
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Received: 05 October 2014
Revised: 13 December 2014
Accepted manuscript online:
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PACS:
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42.25.Bs
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(Wave propagation, transmission and absorption)
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81.05.Xj
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(Metamaterials for chiral, bianisotropic and other complex media)
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78.20.Bh
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(Theory, models, and numerical simulation)
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78.20.Ci
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(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61331005, 11204378, 11274389, 11304393, and 61302023), the Aviation Science Foundation of China (Grant Nos. 20132796018 and 20123196015), the Natural Science Foundation for Post-Doctoral Scientists of China (Grant Nos. 2013M532131 and 2013M532221), the Natural Science Foundation of Shaanxi Province, China (Grant No. 2013JM6005), and the Special Funds for Authors of Annual Excellent Doctoral Degree Dissertations of China (Grant No. 201242). |
Corresponding Authors:
Wang Jun, Qu Shao-Bo
E-mail: wangjun563@163.com;qushaobo@mail.xjtu.edu.cn
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About author: 42.25.Bs; 81.05.Xj; 78.20.Bh; 78.20.Ci |
Cite this article:
Li Li-Yang (李立扬), Wang Jun (王军), Du Hong-Liang (杜红亮), Wang Jia-Fu (王甲富), Qu Shao-Bo (屈绍波) Achieving a multi-band metamaterial perfect absorber via a hexagonal ring dielectric resonator 2015 Chin. Phys. B 24 064201
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