Dynamically tunable high‐efficiency broadband terahertz linear polarization converter based on Dirac semimetal metamaterials. Issue 8 (8th January 2020)

• Record Type: Journal Article
• Authors: Meng, Wanli; Hou, Baoyu; Cao, Qiuhong; Lin, Hongmei; Zhou, Wei; Li, Zhaoxin; Li, Dehua
• Is Part Of: Microwave and optical technology letters. Volume 62:Issue 8(2020:Aug.)
• Page Start: 2703
• Page End: 2707
• Publication Date: 2020-01-08
• Subjects: Dirac semimetal -- dynamic tunability -- metamaterial -- polarization converter -- terahertz; Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.32239
• Languages: English
• ISSNs: 0895-2477

Abstract

Abstract: 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‐μm‐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.