Hyperbolic Metamaterials for Collimation and Subwavelength Focusing

被引：0
|
作者：
Ren, Mina [1 ,2 ]
Liu, Yanhong [1 ,2 ]
Dong, Lijuan [1 ,2 ]
Liu, Lixiang [1 ,2 ]
Deng, Fusheng [2 ]
Shi, Yun-Long [2 ]
机构：
[1] Taiyuan Univ Technol, Sch Mat Sci & Engn, Taiyuan 030024, Peoples R China
[2] Shanxi Datong Univ, Shanxi Prov Key Lab Microstruct Electromagnet Fun, Datong 037009, Peoples R China
来源：
2018 11TH UK-EUROPE-CHINA WORKSHOP ON MILLIMETER WAVES AND TERAHERTZ TECHNOLOGIES (UCMMT2018), VOL 1 | 2018年
基金：
中国国家自然科学基金;
关键词：
hyperbolic metamaterials; canalization regime; collimation; subwavelength focusing; transmission lines;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Collimation and focusing are generally more common in optics field. We demonstrate hyperbolic metamaterials (HMMs) with very flat isofrequency surfaces in wavevector space for tunneling of electromagnetic (EM) energy, which lead to collimation and subwavelength focusing at microwave frequencies. The HMM as a transmission device has been realized by employing two-dimensional metamaterial transmission lines. In HMM operates in canalization regime, the EM waves with different incident angles were refracted in a direction. The HMMs can couple evanescent waves with high wave vectors into propagating modes, and as a result, they provide subwavelength focusing. Focusing of with the narrowest full width half maximum (FWHMs) of about 1/32 of the wavelength at 0.95GHz is confirmed. The numerical simulation and the experimental measurement show good agreement.
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页数：3
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