Optically switchable photonic metasurfaces

被引：39
作者：
Waters, R. F. [1 ,2 ]
Hobson, P. A. [3 ]
MacDonald, K. F. [1 ,2 ]
Zheludev, N. I. [1 ,2 ,4 ,5 ]
机构：
[1] Univ Southampton, Ctr Photon Metamat, Southampton SO17 1BJ, Hants, England
[2] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England
[3] QinetiQ Ltd, Farnborough GU14 0LX, Hants, England
[4] Nanyang Technol Univ, Ctr Disrupt Photon Technol, Singapore 637371, Singapore
[5] Nanyang Technol Univ, Photon Inst, Singapore 637371, Singapore
来源：
APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 08期
基金：
英国工程与自然科学研究理事会;
关键词：
GALLIUM; LIGHT; CRYSTAL; METAMATERIALS; PLASMONICS;
D O I：
10.1063/1.4929396
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We experimentally demonstrate an optically switchable gallium-based metasurface, in which a reversible light-induced transition between solid and liquid phases occurring in a confined nanoscale surface layer of the metal drives significant changes in reflectivity and absorption. The metasurface architecture resonantly enhances the metal's "active plasmonic" phase-change nonlinearity by an order of magnitude, offering high contrast all-optical switching in the near-infrared range at low, mu W mu m(-2), excitation intensities. (C) 2015 AIP Publishing LLC.
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页数：4
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