Optically reconfigurable metasurfaces and photonic devices based on phase change materials

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/103895

Title:	Optically reconfigurable metasurfaces and photonic devices based on phase change materials
Authors:	王智明;Wang, Qian;Rogers, Edward T. F.;Gholipour, Behrad;Wang, Chih-Ming;Yuan, Guanghui;Teng, Jinghua;Zheludev, Nikolay I.
Contributors:	理學院光電科學與工程學系
Keywords:	639/624/1075/401;639/624/399/1015;Antimony;Applied and Technical Physics;Devices;Fresnel zones;Germanium;Holograms;Holography;Lenses;Nanostructure;Optical data processing;Photonics;Physics;Quantum Physics;Tellurium
Date:	2016-01-01
Issue Date:	2026-04-23 11:39:23 (UTC+8)
Publisher:	Nature Publishing Group;London: Springer Science and Business Media LLC
Abstract:	摘要： Photonic components with adjustable parameters, such as variable-focal-length lenses or spectral filters, which can change functionality upon optical stimulation, could offer numerous useful applications. Tuning of such components is conventionally achieved by either micro- or nanomechanical actuation of their constituent parts, by stretching or by heating. Here, we report a novel approach for making reconfigurable optical components that are created with light in a non-volatile and reversible fashion. Such components are written, erased and rewritten as two-dimensional binary or greyscale patterns into a nanoscale film of phase-change material by inducing a refractive-index-changing phase transition with tailored trains of femtosecond pulses. We combine germanium–antimony–tellurium-based films with a diffraction-limited resolution optical writing process to demonstrate a variety of devices: visible-range reconfigurable bichromatic and multi-focus Fresnel zone plates, a super-oscillatory lens with subwavelength focus, a greyscale hologram, and a dielectric metamaterial with on-demand reflection and transmission resonances. A metasurface composed of pixels of optically switchable phase change material yields a photonic platform that can be configured on demand to perform a variety of optical tasks. 其他題名： Nature Photon 出版者： London: Springer Science and Business Media LLC 出版日期： 2016-01-01 出處： Nature Photonics, 2016-01, Vol.10 (1), p.60-65 資源來源： SpringerLink Journals 版權： Springer Nature Limited 2015 版權： Copyright Nature Publishing Group Jan 2016 識別號： ISSN: 1749-4885 識別號： EISSN: 1749-4893 識別號： DOI: 10.1038/nphoton.2015.247
Appears in Collections:	[Department of Optics and Photonics] journal & Dissertation

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