All-dielectric phase-change reconfigurable metasurface

2016268 citationsJournal Articlebronze Open Access

Authors

Artemios Karvounis · University of Southampton

Behrad Gholipour · University of Southampton

Kevin F. MacDonald · University of Southampton

Nikolay I. Zheludev · Nanyang Technological University

Abstract

We harness non-volatile, amorphous-crystalline transitions in the chalcogenide phase-change medium germanium antimony telluride (GST) to realize optically-switchable, all-dielectric metamaterials. Nanostructured, subwavelength-thickness films of GST present high-quality resonances that are spectrally shifted by laser-induced structural transitions, providing reflectivity and transmission switching contrast ratios of up to 5:1 (7 dB) at visible/near-infrared wavelengths selected by design.

Topics & Keywords

Metamaterials and Metasurfaces Applications Phase-change materials and chalcogenides Liquid Crystal Research Advancements

UN Sustainable Development Goals

Sustainable cities and communities

Publication Details

Published in: Applied Physics Letters

Volume 109, Issue 5

DOI: 10.1063/1.4959272

Field-Weighted Citation Impact: 11.77