The University of Southampton
University of Southampton Institutional Repository

Reconfigurable ultraviolet and high-energy-visible dielectric metamaterials

Reconfigurable ultraviolet and high-energy-visible dielectric metamaterials
Reconfigurable ultraviolet and high-energy-visible dielectric metamaterials
Photonic materials with tuneable and switchable ultraviolet (UV) to high-energy-visible (HEV) optical properties would benefit applications in sensing, high-density optical memory, beam-steering, adaptive optics and light modulation. Here, for the first time, we demonstrate a non-volatile switchable dielectric metamaterial operating in the UV-HEV spectral range. Nano-grating metamaterials in a layered composite of low-loss ZnS/SiO2 and the chalcogenide phase-change medium germanium antimony telluride (Ge2Sb2Te5) exhibit reflection resonances at UV-HEV wavelengths that are substantially modified by light-induced (amorphous-crystalline) phase transitions in the chalcogenide layer. Despite the presence of the lossy GST, resonance quality factors up to Q~15 are ensured by the transparency (low losses) of ZnS/SiO2 in the UV-HEV spectral range and values of Q increase as the refractive index of Ge2Sb2Te5 decreases, upon crystallization. Notably however, this switching leaves resonance spectral positions unchanged.
1530-6984
1643-1648
Gholipour, Behrad
c17bd62d-9df6-40e6-bc42-65272d97e559
Piccinotti, Davide
15c6d296-3464-43ec-943a-8155e66d2a51
Karvounis, Artemios
878c12bb-c30e-46f4-8c56-86423b41cdba
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6
Gholipour, Behrad
c17bd62d-9df6-40e6-bc42-65272d97e559
Piccinotti, Davide
15c6d296-3464-43ec-943a-8155e66d2a51
Karvounis, Artemios
878c12bb-c30e-46f4-8c56-86423b41cdba
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6

Gholipour, Behrad, Piccinotti, Davide, Karvounis, Artemios, MacDonald, Kevin F. and Zheludev, Nikolai (2019) Reconfigurable ultraviolet and high-energy-visible dielectric metamaterials. Nano Letters, 19 (3), 1643-1648. (doi:10.1021/acs.nanolett.8b04576).

Record type: Article

Abstract

Photonic materials with tuneable and switchable ultraviolet (UV) to high-energy-visible (HEV) optical properties would benefit applications in sensing, high-density optical memory, beam-steering, adaptive optics and light modulation. Here, for the first time, we demonstrate a non-volatile switchable dielectric metamaterial operating in the UV-HEV spectral range. Nano-grating metamaterials in a layered composite of low-loss ZnS/SiO2 and the chalcogenide phase-change medium germanium antimony telluride (Ge2Sb2Te5) exhibit reflection resonances at UV-HEV wavelengths that are substantially modified by light-induced (amorphous-crystalline) phase transitions in the chalcogenide layer. Despite the presence of the lossy GST, resonance quality factors up to Q~15 are ensured by the transparency (low losses) of ZnS/SiO2 in the UV-HEV spectral range and values of Q increase as the refractive index of Ge2Sb2Te5 decreases, upon crystallization. Notably however, this switching leaves resonance spectral positions unchanged.

Text
nl-2018-04576k-R1 accepted manuscript - Accepted Manuscript
Restricted to Repository staff only until 5 February 2020.
Request a copy

More information

Accepted/In Press date: 4 January 2019
Published date: 5 February 2019

Identifiers

Local EPrints ID: 428163
URI: https://eprints.soton.ac.uk/id/eprint/428163
ISSN: 1530-6984
PURE UUID: 4359a2db-3196-4419-8bb1-207121a52aa6
ORCID for Kevin F. MacDonald: ORCID iD orcid.org/0000-0002-3877-2976
ORCID for Nikolai Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 13 Feb 2019 17:30
Last modified: 18 Jul 2019 10:23

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×