Magnetically Tunable Terahertz Isolator Based on Structured Semiconductor Magneto Plasmonics

被引：44

作者：

Fan, Fei ^{[1
]}

Chang, Sheng-Jiang ^{[1
]}

Gu, Wen-Hao ^{[1
]}

Wang, Xiang-Hui ^{[1
]}

Chen, Ai-Qi ^{[2
]}

机构：

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

[2] Tianjin 1 High Sch, Tianjin 300051, Peoples R China

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2012年 / 24卷 / 22期

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

Isolator; magneto surface plasmon; one-way waveguide; terahertz (THz); PHOTONIC CRYSTALS; MAGNETOPLASMONS; CIRCULATOR;

D O I：

10.1109/LPT.2012.2219858

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：

A tunable terahertz (THz) isolator based on a periodically structured semiconductor magneto plasmonics is proposed. The unique photonic band-gap and one-way transmission property of this structure with different magnetic fields and temperature are investigated in the THz regime. The numerical results show the proposed isolator has a bandwidth of 80 GHz with the maximum isolation of higher than 90 dB and a low insertion loss of 5%. The central operating frequency of this isolator can be broadly tuned from 1.4 to 0.9 THz by changing the external magnetic field from 0.6 to 1.6 Tesla at 195 K. This low-loss high isolation broadband nonreciprocal THz transmission mechanism has great potential applications in promoting the performances of THz application systems.

引用

页码：2080 / 2083

页数：4

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