期刊
APPLIED PHYSICS LETTERS
卷 104, 期 7, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4865897
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资金
- National Natural Science Foundation of China [61322501, 61275183, 60990320, 51202216, 60990322]
- Foundation for the Author of National Excellent Doctoral Dissertation of People's Republic of China [200950]
- National Program for Special Support of Top-Notch Young Professionals
- K. P. Chao's High Technology Development Foundation
- Program for New Century Excellent Talents in University [NCET-12-0489]
Previous subwavelength imaging using hyperlens is based on negative constitutive parameters that are realized by strongly dispersive materials and work only in a narrow frequency band. Here, we demonstrated that subwavelength imaging can be achieved in a broad frequency band using non-resonant magnetic metamaterials. The metamaterial shows an elliptical dispersion relation and can be fabricated by metallic closed-rings with a broadband magnetic response. With this elliptically dispersive material, most of the evanescent waves with high-k modes can be converted to propagating modes and the subwavelength information is reconstructed. Both simulation and experiment results show that this kind of metalens can achieve a broadband subwavelength imaging effect. (C) 2014 AIP Publishing LLC.
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