Optically switchable photonic metasurfaces

被引：38

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.

引用

页数：4

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