期刊
APPLIED PHYSICS LETTERS
卷 104, 期 9, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4867704
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资金
- National Natural Science Foundation of China [51105300]
- Ph.D. Program Foundation of Ministry of Education of China [20110201120075]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education of China
- Fundamental Research Funds for the Central Universities of China
We proposed a method to realize three-dimensional (3D) gradient index (GRIN) devices requiring large refractive index (RI) range with broadband performance. By combining non-resonant GRIN woodpile photonic crystals structure in the metamaterial regime with a compound liquid medium, a wide RI range (1-6.32) was fulfilled flexibly. As a proof-of-principle for the low-loss and non-dispersive method, a 3D Eaton lens was designed and fabricated based on 3D printing process. Full-wave simulation and experiment validated its omnidirectional wave bending effects in a broad bandwidth covering Ku band (12 GHz-18 GHz). (C) 2014 AIP Publishing LLC.
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