Self-Affine Graphene Metasurfaces for Tunable Broadband Absorption

P.C. Wu, N. Papasimakis, Din-ping Tsai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

53 Citations (Scopus)

Abstract

© 2016 American Physical Society.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 the 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 the absorption level and the bandwidth can be controlled electrically by varying the graphene charge-carrier concentration.
Original languageEnglish
Article number044019
JournalPhysical Review Applied
Volume6
Issue number4
DOIs
Publication statusPublished - 28 Oct 2016
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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