title: Mechanically Tunable Dielectric Resonator Metasurfaces at Visible Frequencies.
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.
authors.forename: Philipp
authors.initials: P
authors.lastname: Gutruf
authors.affiliation: School of Electrical and Electronic Engineering, The University of Adelaide , Adelaide, South Australia 5005, Australia.
authors.forename: Chengjun
authors.initials: C
authors.lastname: Zou
authors.affiliation: School of Electrical and Electronic Engineering, The University of Adelaide , Adelaide, South Australia 5005, Australia.|Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology , Ookayama, Merguro-ku, Tokyo 152-8552, Japan.
authors.forename: Withawat
authors.initials: W
authors.lastname: Withayachumnankul
authors.forename: Madhu
authors.initials: M
authors.lastname: Bhaskaran
authors.forename: Sharath
authors.initials: S
authors.lastname: Sriram
authors.affiliation: School of Electrical and Electronic Engineering, The University of Adelaide , Adelaide, South Australia 5005, Australia.
authors.forename: Christophe
authors.initials: C
authors.lastname: Fumeaux
keywords: dielectric resonators; metasurfaces; nanophotonics; stretchable electronics; subwavelength structures