Journal
PHYSICAL REVIEW APPLIED
Volume 6, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevApplied.6.044019
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Funding
- Ministry of Science and Technology, Taiwan [MOST-104-2745-M-002-003-ASP, MOST-105-2745-M-002-002-ASP]
- Academia Sinica [AS-103-TP-A06]
- National Center for Theoretical Sciences
- NEMS Research Center of National Taiwan University
- National Center for High-Performance Computing, Taiwan
- Research Center for Applied Sciences, Academia Sinica, Taiwan
- UK's Engineering and Physical Sciences Research Council [EP/M008797/1]
- Leverhulme Trust
- EPSRC [EP/M008797/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M008797/1] Funding Source: researchfish
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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.
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