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Micromachines 2018, 9(11), 560; https://doi.org/10.3390/mi9110560

Recent Advances in Tunable and Reconfigurable Metamaterials

1,†
,
1,†
,
1
,
2,3,4,5
and
1,6,7,*
1
Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
2
Metamaterials Laboratory, RIKEN Cluster for Pioneering Research, Saitama 351-0198, Japan
3
Innovative Photon Manipulation Research Team, RIKEN Center for Advanced Photonics, Saitama 351-0198, Japan
4
School of Materials and Chemical Technology, Tokyo Institute of Technology, Tokyo 152-8550, Japan
5
Department of Physics, Gakushuin University, Tokyo 171-8588, Japan
6
Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
7
National Institute of Nanomaterials Technology (NINT), Pohang 37673, Korea
These authors have equally contributed to this work.
*
Author to whom correspondence should be addressed.
Received: 14 October 2018 / Accepted: 26 October 2018 / Published: 31 October 2018
(This article belongs to the Special Issue Optofluidics 2018)
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Abstract

Metamaterials are composed of nanostructures, called artificial atoms, which can give metamaterials extraordinary properties that cannot be found in natural materials. The nanostructures themselves and their arrangements determine the metamaterials’ properties. However, a conventional metamaterial has fixed properties in general, which limit their use. Thus, real-world applications of metamaterials require the development of tunability. This paper reviews studies that realized tunable and reconfigurable metamaterials that are categorized by the mechanisms that cause the change: inducing temperature changes, illuminating light, inducing mechanical deformation, and applying electromagnetic fields. We then provide the advantages and disadvantages of each mechanism and explain the results or effects of tuning. We also introduce studies that overcome the disadvantages or strengthen the advantages of each classified tunable metamaterial. View Full-Text
Keywords: metasurface; perfect absorber; wavefront engineering; color filter; plasmonics; phase change material; graphene; indium tin oxide metasurface; perfect absorber; wavefront engineering; color filter; plasmonics; phase change material; graphene; indium tin oxide
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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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Bang, S.; Kim, J.; Yoon, G.; Tanaka, T.; Rho, J. Recent Advances in Tunable and Reconfigurable Metamaterials. Micromachines 2018, 9, 560.

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