Tunable nonreciprocal terahertz transmission and enhancement based on metal/magneto-optic plasmonic lens

被引：70

作者：

Fan, Fei ^{[1
]}

Chen, Sai ^{[1
]}

Wang, Xiang-Hui ^{[1
]}

Chang, Sheng-Jiang ^{[1
]}

机构：

[1] Nankai Univ, Inst Modern Opt, Key Lab Opt Informat Sci & Technol, Minist Educ, Tianjin 300071, Peoples R China

来源：

OPTICS EXPRESS | 2013年 / 21卷 / 07期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

All Open Access; Gold;

D O I：

10.1364/OE.21.008614

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A tunable metal/magneto-optic plasmonic lens for terahertz isolator is demonstrated. Based on the magneto-optical effect of the semiconductor material and non-symmetrical structure, this plasmonic lens has not only the focusing feature but also nonreciprocal transmission property. Moreover, a transmission enhancement through this device greatly larger than that of the ordinary metallic slit arrays is contributed by the extraordinary optical transmission effect of the magneto surface plasmon polaritons. The results show that the proposed isolator has an isolation bandwidth of larger than 0.4THz and the maximum isolation of higher than 110dB, and its operating frequency also can be broadly tuned by changing the external magnetic field or temperature. This low-loss, high isolation, broadband tunable nonreciprocal terahertz transmission mechanism has a great potential for terahertz application systems. (C) 2013 Optical Society of America

引用

页码：8614 / 8621

页数：8

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