Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/144780
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. | URI: | https://hdl.handle.net/10356/144780 | ISSN: | 1530-6984 | DOI: | 10.1021/acs.nanolett.8b04576 | Schools: | School of Physical and Mathematical Sciences | Research Centres: | Centre for Disruptive Photonic Technologies (CDPT) The Photonics Institute |
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 https://doi.org/10.1021/acs.nanolett.8b04576 | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | SPMS Journal Articles |
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