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Type: Journal article
Title: Mechanically tunable dielectric resonator metasurfaces at visible frequencies
Author: Gutruf, P.
Zou, C.
Withayachumnankul, W.
Bhaskaran, M.
Sriram, S.
Fumeaux, C.
Citation: ACS Nano, 2016; 10(1):133-141
Publisher: American Chemical Society
Issue Date: 2016
ISSN: 1936-086X
Statement of
Philipp Gutruf, Chengjun Zou, Withawat Withayachumnankul, Madhu Bhaskaran, Sharath Sriram, and Christophe Fumeaux
Abstract: Devices that manipulate light represent the future of information processing. Flat optics and structures with subwavelength periodic features (metasurfaces) provide compact and efficient solutions. The key bottleneck is efficiency, and replacing metallic resonators with dielectric resonators has been shown to significantly enhance performance. To extend the functionalities of dielectric metasurfaces to real-world optical applications, the ability to tune their properties becomes important. In this article, we present a mechanically tunable all-dielectric metasurface. This is composed of an array of dielectric resonators embedded in an elastomeric matrix. The optical response of the structure under a uniaxial strain is analyzed by mechanical-electromagnetic co-simulations. It is experimentally demonstrated that the metasurface exhibits remarkable resonance shifts. Analysis using a Lagrangian model reveals that strain modulates the near-field mutual interaction between resonant dielectric elements. The ability to control and alter inter-resonator coupling will position dielectric metasurfaces as functional elements of reconfigurable optical devices.
Keywords: dielectric resonators
stretchable electronics
subwavelength structures
Rights: © 2015 American Chemical Society
DOI: 10.1021/acsnano.5b05954
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Electrical and Electronic Engineering publications

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