Coupling enhancement of split ring resonators on graphene
Date
2014-12Source Title
Carbon
Print ISSN
0008-6223
Publisher
Pergamon Press
Volume
80
Pages
351 - 355
Language
English
Type
ArticleItem Usage Stats
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Abstract
Metallic split ring resonator (SRR) structures are used in nanophotonics applications in order to localize and enhance incident electromagnetic field. Electrically controllable sheet carrier concentration of graphene provides a platform where the resonance of the SRRs fabricated on graphene can be tuned. The reflectivity spectra of SRR arrays shift by applying gate voltage, which modulates the sheet carrier concentration, and thereby the optical conductivity of monolayer graphene. We experimentally and numerically demonstrated that the tuning range can be increased by tailoring the effective mode area of the SRR and enhancing the interaction with graphene. The tuning capability is one of the important features of graphene based tunable sensors, optical switches, and modulator applications. © 2014 Elsevier Ltd. All rights reserved.
Keywords
Carrier concentrationElectromagnetic fields
Graphene
Optical conductivity
Optical resonators
Optical switches
Resonators
Tuning effective mode areas
Important features
Reflectivity spectra
Sheet carrier concentration
Split ring resonator
Tunable sensors
Tuning capability