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Title: Optically switchable photonic metasurfaces

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, μW μm{sup −2}, excitation intensities.
Authors:
;  [1] ;  [2] ;  [1] ;  [3]
  1. Centre for Photonic Metamaterials and Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ (United Kingdom)
  2. QinetiQ Ltd., Cody Technology Park, Farnborough, Hampshire GU14 0LX (United Kingdom)
  3. (Singapore)
Publication Date:
OSTI Identifier:
22489136
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; EXCITATION; GALLIUM; LAYERS; LIQUIDS; NANOSTRUCTURES; NONLINEAR PROBLEMS; REFLECTIVITY; SOLIDS; SURFACES; VISIBLE RADIATION