Actively controlled plasmonic Bragg reflector based on a graphene parallel-plate waveguide

Abstract

We investigate theoretically and numerically a graphene parallel-plate waveguide structure with two alternate chemical potentials (which can be realized by alternately applying two biased voltages to graphene). A plasmonic Bragg reflector can be formed in infrared range because of the alternate effective refractive indexes of SPPs propagating along graphene sheets. By introducing a defect into the Bragg reflector, and then the defect resonance mode can be formed. Thanks to the tunable permittivity of graphene by bias voltages, the central wavelength and bandwidth of SPPs stop band, and the wavelength of the defect mode can be tuned.

Tunable Multiple Plasmon-Induced Transparencies Based on Asymmetrical Grapheme Nanoribbon Structures

“…Re-fabricating the structure is not necessary anymore. There have been many applications based on graphene, including absorbers [ 21 ], electro-optical switches [ 22 ], field-effect transistors [ 23 ], amplifiers [ 24 ], diodes [ 25 ], terahertz antennas [ 26 ], filters [ 27 ], mixers [ 28 ], plasmonic Bragg reflectors [ 29 ], and so on. A graphene-based plasmonic analog to EIT nanostructures has already been numerically illustrated by Shi et al [ 30 ].…”

A Generalized Lossy Transmission-Line Model for Tunable Graphene-Based Transmission Lines with Attenuation Phenomenon

“…Graphene is a promising candidate for nanoelectronics and nanophotonics devices due to its remarkable electro-optical property 1 2 . Graphene has aroused great interest and its potential applications for various fields have been explored recently 3 4 5 6 7 8 9 10 11 . For example, the reported graphene-based devices include absorbers 3 , electro-optical switches 4 , field-effect transistors 5 , amplifiers 6 , diodes 7 , terahertz antennas 8 , filters 9 , mixers 10 , plasmonic bragg reflectors 11 , and so on.…”