Dynamically tunable electro-optic switch and multimode filter based on twisted bilayer graphene strips
- 29 January 2021
- journal article
- research article
- Published by IOP Publishing in Journal of Optics
- Vol. 23 (2), 025104
- https://doi.org/10.1088/2040-8986/abe188
Abstract
Twisted bilayer graphene strips are proposed to excite dual-plasmon-induced-transparency (DPIT). Coupled mode theory is employed to fit the transmission spectra of finite-difference time-domain numerical simulations. When the upper- and lower-layers graphene are perpendicular to each other, an electric-optic switch can be realized only by changing the Fermi level of graphene, and the modulation degree of amplitude reaches 55%. Interestingly, DPIT can be degenerated to single PIT and gradually disappeared by changing the angle between the upper- and lower-layers graphene, thus multimode filters can be designed. Therefore, this work provides new ideas for designing multifunctional electro-optic devices.Keywords
Funding Information
- The Jiangxi province graduate innovation special fund project (YC2020-S312)
- the scientific research fund of Sichuan Provincial Science and Technology Department (2020YJ0137)
- National Natural Science Foundation of China (11847026)
- Natural Science Foundation of Jiangxi Province (20192BAB212003)
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