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Optically switchable photonic metasurfaces

Optically switchable photonic metasurfaces
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/µm2, excitation intensities.
0003-6951
Waters, R.F.
5e879468-af85-47d3-8db5-1c4b4d3eaad3
Hobson, P.A.
35632033-7e95-4ed5-9acd-77637567089f
MacDonald, K.F.
76c84116-aad1-4973-b917-7ca63935dba5
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Waters, R.F.
5e879468-af85-47d3-8db5-1c4b4d3eaad3
Hobson, P.A.
35632033-7e95-4ed5-9acd-77637567089f
MacDonald, K.F.
76c84116-aad1-4973-b917-7ca63935dba5
Zheludev, N.I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Waters, R.F., Hobson, P.A., MacDonald, K.F. and Zheludev, N.I. (2015) Optically switchable photonic metasurfaces. Applied Physics Letters, 107 (8). (doi:10.1063/1.4929396).

Record type: Article

Abstract

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/µm2, excitation intensities.

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Accepted/In Press date: 11 August 2015
e-pub ahead of print date: 24 August 2015
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 380436
URI: https://eprints.soton.ac.uk/id/eprint/380436
ISSN: 0003-6951
PURE UUID: 32c61055-894a-4f2b-b15d-8eec55fa5ac7
ORCID for K.F. MacDonald: ORCID iD orcid.org/0000-0002-3877-2976
ORCID for N.I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 14 Sep 2015 14:01
Last modified: 03 Dec 2019 02:03

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