High-efficiency broadband anomalous reflection by gradient meta-surfaces

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/103524

Title:	High-efficiency broadband anomalous reflection by gradient meta-surfaces
Authors:	王智明;Sun, Shulin;Yang, Kuang-Yu;Wang, Chih-Ming;Juan, Ta-Ko;Chen, Wei Ting;Liao, Chun Yen;He, Qiong;Xiao, Shiyi;Kung, Wen-Ting;Guo, Guang-Yu;Zhou, Lei;Tsai, Din Ping
Contributors:	理學院光電科學與工程學系
Keywords:	Angle of reflection;Antireflection coatings;Broadband;Collective excitations (including excitons, polarons, plasmons and other charge-density excitations);Condensed matter: electronic structure, electrical, magnetic, and optical properties;Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures;Exact sciences and technology;Finite difference time domain method;Nanostructure;Physics;Polarization;Reflection;Spectra;Surface and interface electron states;Surface waves
Date:	2012-12-12
Issue Date:	2026-04-23 11:32:10 (UTC+8)
Publisher:	American Chemical Society;Washington, DC: American Chemical Society
Abstract:	摘要： We combine theory and experiment to demonstrate that a carefully designed gradient meta-surface supports high-efficiency anomalous reflections for near-infrared light following the generalized Snell’s law, and the reflected wave becomes a bounded surface wave as the incident angle exceeds a critical value. Compared to previously fabricated gradient meta-surfaces in infrared regime, our samples work in a shorter wavelength regime with a broad bandwidth (750–900 nm), exhibit a much higher conversion efficiency (∼80%) to the anomalous reflection mode at normal incidence, and keep light polarization unchanged after the anomalous reflection. Finite-difference-time-domain (FDTD) simulations are in excellent agreement with experiments. Our findings may lead to many interesting applications, such as antireflection coating, polarization and spectral beam splitters, high-efficiency light absorbers, and surface plasmon couplers. 其他題名： Nano Lett 出版者： Washington, DC: American Chemical Society 出版日期： 2012-12-12 出處： Nano Letters, 2012-12, Vol.12 (12), p.6223-6229 資源來源： American Chemical Society Journals 版權： Copyright © 2012 American Chemical Society 版權： 2014 INIST-CNRS 識別號： ISSN: 1530-6984 識別號： ISSN: 1530-6992 識別號： EISSN: 1530-6992 識別號： DOI: 10.1021/nl3032668 識別號： PMID: 23189928
Appears in Collections:	[Department of Optics and Photonics] journal & Dissertation

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