Self-affine graphene metasurfaces for tunable broadband absorption
Self-affine graphene metasurfaces for tunable broadband absorption
Graphene has emerged as a promising platform for THz metasurfaces supporting electrically tunable deep-subwavelength plasmonic excitations. Here, we introduce a broadband graphene metasurface based on the Hilbert curve, a continuous, space-filling fractal. We demonstrate enhancement of graphene absorption over a broad frequency band (0.5-60 THz) with an average absorption level exceeding 20%. Owing to the continuous nature of the metasurface patterns, both absorption level and bandwidth can be controlled electrically by varying the graphene charge carrier concentration.
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Wu, Pin Chieh
1d63065a-5d41-4599-bca2-23bbf05ae42f
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Tsai, Din Ping
29dbf01e-c22a-45a5-95b3-839a185d1779
28 October 2016
Wu, Pin Chieh
1d63065a-5d41-4599-bca2-23bbf05ae42f
Papasimakis, Nikitas
f416bfa9-544c-4a3e-8a2d-bc1c11133a51
Tsai, Din Ping
29dbf01e-c22a-45a5-95b3-839a185d1779
Wu, Pin Chieh, Papasimakis, Nikitas and Tsai, Din Ping
(2016)
Self-affine graphene metasurfaces for tunable broadband absorption.
Physical Review Applied, 6 (44019), .
(doi:10.1103/PhysRevApplied.6.044019).
Abstract
Graphene has emerged as a promising platform for THz metasurfaces supporting electrically tunable deep-subwavelength plasmonic excitations. Here, we introduce a broadband graphene metasurface based on the Hilbert curve, a continuous, space-filling fractal. We demonstrate enhancement of graphene absorption over a broad frequency band (0.5-60 THz) with an average absorption level exceeding 20%. Owing to the continuous nature of the metasurface patterns, both absorption level and bandwidth can be controlled electrically by varying the graphene charge carrier concentration.
Text
Manuscript_revised.pdf
- Accepted Manuscript
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Accepted/In Press date: 26 September 2016
e-pub ahead of print date: 28 October 2016
Published date: 28 October 2016
Organisations:
Optoelectronics Research Centre
Identifiers
Local EPrints ID: 400946
URI: http://eprints.soton.ac.uk/id/eprint/400946
PURE UUID: e05deb05-e79b-4d35-92eb-237f61f8bd00
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Date deposited: 30 Sep 2016 09:59
Last modified: 15 Mar 2024 05:56
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Author:
Pin Chieh Wu
Author:
Din Ping Tsai
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