Multifunctional and tunable trigate graphene metamaterial with "Lakes of Wada" topology

Author(s)
Yang Liu, Xiaodan Xu, Donghao Yang, Xinzheng Zhang, Mengxin Ren, Nan Gong, Wei Cai, Faheem Hassan, Zhimao Zhu, Irena Drevensek-Olenik, Romano A. Rupp, Jingjun Xu
Abstract

Many plasmon-induced transparency (PIT) metamaterials previously reported had limited functions. Their tunabilities were realized by complex discrete structures, which greatly increased the difficulty and cost of device fabrication and adversely affected their resonance characteristics. It is an open question to adjust the Fermi levels of many graphene patterns with only a few in-plane electrodes. We propose and numerically study a novel electrically tunable and multifunctional frigate graphene metamaterial (TGGM) based on the concept of "Lakes of Wada". Benefiting from the trigate regulation, our proposed TGGM turns out to exhibit excellent characteristics, that can not only be used for terahertz band-stop filter, terahertz refractive index sensor, near-field optical switch, slow-light device, but also for double PIT window metamaterial with broad transparency windows and large tunable frequency range. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Organisation(s)
Physics of Functional Materials
External organisation(s)
Nankai University, Shanxi University (SXU), University of Ljubljana
Journal
Optics Express
Volume
28
Pages
24772-24788
No. of pages
17
ISSN
1094-4087
DOI
https://doi.org/10.1364/OE.398346
Publication date
08-2020
Peer reviewed
Yes
Austrian Fields of Science 2012
103021 Optics
Keywords
Portal url
https://ucris.univie.ac.at/portal/en/publications/multifunctional-and-tunable-trigate-graphene-metamaterial-with-lakes-of-wada-topology(31f80c57-032e-4bb5-b0e7-a9604cc7f16e).html