Dynamically tunable high-efficiency broadband terahertz linear polarization converter based on Dirac semimetal metamaterials

被引：12
|
作者：
Meng, Wanli [1 ]
Hou, Baoyu [1 ]
Cao, Qiuhong [1 ]
Lin, Hongmei [1 ]
Zhou, Wei [1 ]
Li, Zhaoxin [1 ]
Li, Dehua [1 ]
机构：
[1] Shandong Univ Sci & Technol, Qingdao Key Lab Terahertz Technol, Coll Elect & Informat Engn, Qingdao, Peoples R China
来源：
MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2020年 / 62卷 / 08期
关键词：
Dirac semimetal; dynamic tunability; metamaterial; polarization converter; terahertz; REFRACTIVE-INDEX;
D O I：
10.1002/mop.32239
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：
An electrically-tunable polarization converter with a dynamic range of 2.026 to 2.481 THz is designed and simulated in this work. A dumbbell-like Dirac semimetal metamaterial is fabricated and attached to a Teflon plate, with a perfect electric conductor as the substrate. Simulation results show that for a 22-mu m-thick Teflon plate and a Fermi level is 60 meV, the polarization conversion rate reaches 100% at the two resonance frequencies of 2.072 and 2.428 THz. Moreover, the polarization conversion rate exceeds 85% in the frequency range of 2.026 to 2.481 THz.
引用
收藏
页码：2703 / 2707
页数：5
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