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Actively tunable terahertz electromagnetically induced transparency analogue based on vanadium-oxide-assisted metamaterials

Authors :
Zhang, Zhaojian
Yang, Junbo
Han, Yunxin
He, Xin
Zhang, Jingjing
Huang, Jie
Chen, Dingbo
Xu, Siyu
Xie, Wanlin
Source :
Appl. Phys. A 126, 199 (2020)
Publication Year :
2019

Abstract

Recently, phase-change materials (PCMs) have drawn more attention due to the dynamically tunable optical properties. Here, we investigate the active control of electromagnetically induced transparency (EIT) analogue based on terahertz (THz) metamaterials integrated with vanadium oxide (VO2). Utilizing the insulator-to-metal transition of VO2, the amplitude of EIT peak can be actively modulated with a significant modulation depth. Meanwhile the group delay within the transparent window can also be dynamically tuned, achieving the active control of slow light effect. Furthermore, we also introduce independently tunable transparent peaks as well as group delay based on a double-peak EIT with good tuning performance. Finally, based on broadband EIT, the active tuning of quality factor of the EIT peak is also realized. This work introduces active EIT control with more degree of freedom by employing VO2, and can find potential applications in future wireless and ultrafast THz communication systems as multi-channel filters, switches, spacers, logic gates and modulators.

Details

Database :
arXiv
Journal :
Appl. Phys. A 126, 199 (2020)
Publication Type :
Report
Accession number :
edsarx.1905.10623
Document Type :
Working Paper
Full Text :
https://doi.org/10.1007/s00339-020-3374-2