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Random access actuation of nanowire grid metamaterial

Random access actuation of nanowire grid metamaterial
Random access actuation of nanowire grid metamaterial
While metamaterials offer engineered static optical properties, future artificial media with dynamic random-access control over shape and position of meta-molecules will provide arbitrary control of light propagation. The simplest example of such a reconfigurable metamaterial is a nanowire grid metasurface with subwavelength wire spacing. Recently we demonstrated computationally that such a metadevice with individually controlled wire positions could be used as dynamic diffraction grating, beam steering module and tunable focusing element. Here we report on the nanomembrane realization of such a nanowire grid metasurface constructed from individually addressable plasmonic chevron nanowires with a 230nm x 100nm cross-section, which consist of gold and silicon nitride. The active structure of the metadevice consists of 15 nanowires each 18 microns long and is fabricated by a combination of electron beam lithography and ion beam milling. It is packaged as a microchip device where the nanowires can be individually actuated by control currents via differential thermal expansion.
reconfigurable metamaterial, nanowire, metadevice, nanoelectromechanical system
0957-4484
1-6
Cencillo Abad, Pablo
7d5103d0-e4d3-431b-ac53-7a20b2128228
Ou, Jun-Yu
3fb703e3-b222-46d2-b4ee-75f296d9d64d
Plum, Eric
50761a26-2982-40df-9153-7aecc4226eb5
Valente, João
b1d50ead-5c3d-4416-ad05-3beb1b373146
Zheludev, Nikolay
32fb6af7-97e4-4d11-bca6-805745e40cc6
Cencillo Abad, Pablo
7d5103d0-e4d3-431b-ac53-7a20b2128228
Ou, Jun-Yu
3fb703e3-b222-46d2-b4ee-75f296d9d64d
Plum, Eric
50761a26-2982-40df-9153-7aecc4226eb5
Valente, João
b1d50ead-5c3d-4416-ad05-3beb1b373146
Zheludev, Nikolay
32fb6af7-97e4-4d11-bca6-805745e40cc6

Cencillo Abad, Pablo, Ou, Jun-Yu, Plum, Eric, Valente, João and Zheludev, Nikolay (2016) Random access actuation of nanowire grid metamaterial. Nanotechnology, 27 (48), 1-6. (doi:10.1088/0957-4484/27/48/485206).

Record type: Article

Abstract

While metamaterials offer engineered static optical properties, future artificial media with dynamic random-access control over shape and position of meta-molecules will provide arbitrary control of light propagation. The simplest example of such a reconfigurable metamaterial is a nanowire grid metasurface with subwavelength wire spacing. Recently we demonstrated computationally that such a metadevice with individually controlled wire positions could be used as dynamic diffraction grating, beam steering module and tunable focusing element. Here we report on the nanomembrane realization of such a nanowire grid metasurface constructed from individually addressable plasmonic chevron nanowires with a 230nm x 100nm cross-section, which consist of gold and silicon nitride. The active structure of the metadevice consists of 15 nanowires each 18 microns long and is fabricated by a combination of electron beam lithography and ion beam milling. It is packaged as a microchip device where the nanowires can be individually actuated by control currents via differential thermal expansion.

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More information

Accepted/In Press date: 12 October 2016
e-pub ahead of print date: 4 November 2016
Published date: 4 November 2016
Keywords: reconfigurable metamaterial, nanowire, metadevice, nanoelectromechanical system
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 401487
URI: https://eprints.soton.ac.uk/id/eprint/401487
ISSN: 0957-4484
PURE UUID: aab4468f-687f-487e-a895-dd5bbb701db7
ORCID for Jun-Yu Ou: ORCID iD orcid.org/0000-0001-8028-6130
ORCID for Eric Plum: ORCID iD orcid.org/0000-0002-1552-1840
ORCID for Nikolay Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 19 Oct 2016 10:24
Last modified: 15 Aug 2019 05:17

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