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Title: Reconfigurable ultraviolet and high-energy visible dielectric metamaterials
Authors: Gholipour, Behrad
Piccinotti, Davide
Karvounis, Artemios
MacDonald, Kevin F.
Zheludev, Nikolay I.
Keywords: Science::Physics
Issue Date: 2019
Source: Gholipour, B., Piccinotti, D., Karvounis, A., MacDonald, K. F., & Zheludev, N. I. (2019). Reconfigurable Ultraviolet and High-Energy Visible Dielectric Metamaterials. Nano Letters, 19(3), 1643–1648. doi:10.1021/acs.nanolett.8b04576
Journal: Nano letters
Abstract: Photonic materials with tunable and switchable ultraviolet (UV) to high-energy visible (HEV) optical properties may benefit applications such as sensing, high-density optical memory, beam-steering, adaptive optics, and light modulation. Here, for the first time we demonstrate a nonvolatile switchable dielectric metamaterial operating in the UV-HEV spectral range. Nanograting metamaterials in a layered composite of low-loss ZnS/SiO2 and the chalcogenide phase-change medium germanium-antimony-telluride (Ge2Sb2Te5 or GST) 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.
ISSN: 1530-6984
DOI: 10.1021/acs.nanolett.8b04576
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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