Amplitude modulation of anomalously refracted terahertz waves with gated-graphene metasurfaces

Kim, T.-T., Kim, H., Kenney, M. , Park, H. S., Kim, H.-D., Min, B. and Zhang, S. (2018) Amplitude modulation of anomalously refracted terahertz waves with gated-graphene metasurfaces. Advanced Optical Materials, 6(1), 1700507. (doi: 10.1002/adom.201700507)

152391.pdf - Accepted Version



Although recent progress in metasurfaces has shown great promise for applications, optical properties in metasurfaces are typically fixed by their structural geometry and dimensions. Here, an electrically controllable amplitude of anomalously-refracted waves in a hybrid graphene/metasurface system are experimentally demonstrated, which consists of an artificially constructed two-dimensional metallic apertures array and naturally occurring two-dimensional carbon atoms (graphene) in the subwavelength-scale (< λ/10). Based on Pancharatnam–Berry phase and by careful design of a spatially linear phase profile, it is shown that the amplitude of anomalously refracted circularly cross-polarized terahertz waves can be effectively modulated by an applied gate voltage. The developed electrically tunable graphene metasurfaces may lead to various advanced applications that require dynamical control over electromagnetic waves, such as amplitude tunable active focusing lenses, vortex phase plates and dynamic holography.

Item Type:Articles
Additional Information:T.-T.K and H.K. contributed equally to this work. This work was supported by IBS-R011-D1, the National Research Foundation of Korea (NRF) through the government of Korea (MSIP) (Grant Nos. NRF-2017R1A2B3012364, 2014M3C1A3052537, and 2015001948). This work was also supported by the Center for Advanced Meta-Materials (CAMM) funded by Korea Government (MSIP) as Global Frontier Project (CAMM 2014M3A6B3063709), the ERC Consolidator Grant (TOPOLOGICAL), and the Royal Society.
Glasgow Author(s) Enlighten ID:Kenney, Dr Mitchell Guy
Authors: Kim, T.-T., Kim, H., Kenney, M., Park, H. S., Kim, H.-D., Min, B., and Zhang, S.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Advanced Optical Materials
ISSN (Online):2195-1071
Published Online:20 November 2017
Copyright Holders:Copyright © 2017 Wiley-VCH Verlag GmbH & Co.
First Published:First published in Advanced Optical Materials 6(1):1700507
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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