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Nanomaterials 2019, 9(3), 398; https://doi.org/10.3390/nano9030398

Recent Progress on Graphene-Functionalized Metasurfaces for Tunable Phase and Polarization Control

1
Institute of Modern Optics, Nankai University, Tianjin 300350, China
2
Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, Tianjin 300350, China
*
Author to whom correspondence should be addressed.
Received: 22 January 2019 / Revised: 16 February 2019 / Accepted: 17 February 2019 / Published: 8 March 2019
(This article belongs to the Special Issue Electronic and Thermal Properties of Graphene)
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Abstract

The combination of graphene and a metasurface holds great promise for dynamic manipulation of the electromagnetic wave from low terahertz to mid-infrared. The optical response of graphene is significantly enhanced by the highly-localized fields in the meta-atoms, and the characteristics of meta-atoms can in turn be modulated in a large dynamic range through electrical doping of graphene. Graphene metasurfaces are initially focused on intensity modulation as modulators and tunable absorbers. In this paper, we review the recent progress of graphene metasurfaces for active control of the phase and the polarization. The related applications involve, but are not limited to lenses with tunable intensity or focal length, dynamic beam scanning, wave plates with tunable frequency, switchable polarizers, and real-time generation of an arbitrary polarization state, all by tuning the gate voltage of graphene. The review is concluded with a discussion of the existing challenges and the personal perspective of future directions. View Full-Text
Keywords: graphene; metasurface; phase shift; polarization; wavefront shaping; tunability graphene; metasurface; phase shift; polarization; wavefront shaping; tunability
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Cheng, J.; Fan, F.; Chang, S. Recent Progress on Graphene-Functionalized Metasurfaces for Tunable Phase and Polarization Control. Nanomaterials 2019, 9, 398.

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