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Title: Giant asymmetric radiation from an ultrathin bianisotropic metamaterial
Authors: Peng, Liang
Wang, Kewen
Yang, Yihao
Chen, Yuntian
Wang, Gaofeng
Zhang, Baile
Chen, Hongsheng
Keywords: Asymmetrical Radiation
Electromagnetic Metamaterials
Issue Date: 2018
Source: Peng, L., Wang, K., Yang, Y., Chen, Y., Wang, G., Zhang, B., et al. (2018). Giant asymmetric radiation from an ultrathin bianisotropic metamaterial. Advanced Science, 5(7), 1700922-.
Series/Report no.: Advanced Science
Abstract: Unidirectional radiation is of particular interest in high‐power lasing and optics. Commonly, however, it is difficult to achieve a unidirectional profile in such a system without breaking reciprocity. Recently, assisted by metamaterials without structural symmetry, antennas that radiate asymmetrically have been developed, hence providing the possibility of achieving unidirectionality. Nevertheless, it has been challenging to achieve extremely high radiation asymmetry in such antennas. Here, it is demonstrated that this radiation asymmetry is further enhanced when magnetic plasmons are present in the metamaterials. Experimentally, it is shown that a thin metamaterial with a thickness of ≈λ0/8 can exhibit a forward‐to‐backward emission asymmetry of up to 1:32 without any optimization. The work paves the way for manipulating asymmetric radiation by means of metamaterials and may have a variety of promising applications, such as directional optical and quantum emitters, lasers, and absorbers.
DOI: 10.1002/advs.201700922
Rights: © 2018 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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