Self-Affine Graphene Metasurfaces for Tunable Broadband Absorption

Pin Chieh Wu, Nikitas Papasimakis, Din Ping Tsai

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

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 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 - 2016 Oct 28

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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