Graphene plasmon cavities made with silicon carbide
File(s)
Author(s)
Type
Journal Article
Abstract
We propose a simple way to create tunable plasmonic cavities in the infrared (IR) range using graphene films suspended upon a silicon carbide (SiC) grating and present a numerical investigation, using the finite element method, on the absorption properties and field distributions of such resonant structures. We find at certain frequencies within the SiC reststrahlen band that the structured SiC substrate acts as a perfect reflector, providing a cavity effect by establishing graphene plasmon standing waves. We also provide clear evidence of strong coupling phenomena between the localized surface phonon polariton resonances in the SiC grating with the graphene surface plasmon cavity modes, which is revealed by a Rabi splitting in the absorption spectrum. This paves the way to build simple plasmonic structures, using well-known materials and experimental techniques, that can be used to excite graphene plasmons efficiently, even at normal incidence, as well as explore cavity quantum electrodynamics and potential applications in IR spectroscopy.
Date Issued
2017-07-14
Date Acceptance
2017-06-20
Citation
ACS Omega, 2017, 2 (7), pp.3640-3646
ISSN
2470-1343
Publisher
American Chemical Society
Start Page
3640
End Page
3646
Journal / Book Title
ACS Omega
Volume
2
Issue
7
Copyright Statement
© 2017 American Chemical Society
Sponsor
Office Of Naval Research Global
Grant Number
N62909-15-1-N082
Publication Status
Published