All-dielectric three-dimensional broadband Eaton lens with large refractive index range

被引：40
|
作者：
Yin, Ming [1 ]
Tian, Xiao Yong [1 ]
Wu, Ling Ling [1 ]
Li, Di Chen [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 09期
基金：
中国国家自然科学基金;
关键词：
TRANSFORMATION-OPTICS; INVISIBILITY CLOAK; LUNEBURG; ANTENNAS;
D O I：
10.1063/1.4867704
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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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页数：4
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