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.
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
5 February 2019
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), .
(doi:10.1021/acs.nanolett.8b04576).
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
More information
Accepted/In Press date: 4 January 2019
Published date: 5 February 2019
Identifiers
Local EPrints ID: 428163
URI: http://eprints.soton.ac.uk/id/eprint/428163
ISSN: 1530-6984
PURE UUID: 4359a2db-3196-4419-8bb1-207121a52aa6
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Date deposited: 13 Feb 2019 17:30
Last modified: 16 Mar 2024 07:34
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Contributors
Author:
Behrad Gholipour
Author:
Davide Piccinotti
Author:
Artemios Karvounis
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