Highly efficient plasmonic enhancement of graphene absorption at telecommunication wavelengths

Lu, H, Cumming, B and Gu, M 2015, 'Highly efficient plasmonic enhancement of graphene absorption at telecommunication wavelengths', Optics Letters, vol. 40, no. 15, pp. 3647-3650.


Document type: Journal Article
Collection: Journal Articles

Title Highly efficient plasmonic enhancement of graphene absorption at telecommunication wavelengths
Author(s) Lu, H
Cumming, B
Gu, M
Year 2015
Journal name Optics Letters
Volume number 40
Issue number 15
Start page 3647
End page 3650
Total pages 4
Publisher Optical Society of America
Abstract A hybrid graphene system consisting of graphene and silica layers coated on a metal film with groove rings is proposed to strongly enhance light absorption in the graphene layer. Our results indicate that the excited localized plasmon resonance in groove rings can effectively improve the graphene absorption from 2.3% to 43.1%, even to a maximum value of 87.0% in five-layer graphene at telecommunication wavelengths. In addition, the absorption peak is strongly dependent on the groove depth and ring radius as well as the number of graphene layers, enabling the flexible selectivity of both the operating spectral position and bandwidth. This favorable enhancement and tunability of graphene absorption could provide a path toward high-performance graphene opto-electronic components, such as photodetectors.
Subject Biomedical Engineering not elsewhere classified
Keyword(s) Electromagnetic wave absorption
Light absorption
Plasmons Absorption peaks
Graphene layers
Groove depth
Localized plasmon resonance
Silica layers
Spectral position
Telecommunication wavelengths
Tunabilities Engineering main heading: Graphene
DOI - identifier 10.1364/OL.40.003647
Copyright notice © 2015 Optical Society of America.
ISSN 0146-9592
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