The University of Southampton
University of Southampton Institutional Repository

Optical bistability in shape-memory nanowire metamaterial array

Optical bistability in shape-memory nanowire metamaterial array
Optical bistability in shape-memory nanowire metamaterial array
Non-volatile temperature-induced structural phase transitions such as those found in chalcogenide glasses are known to lead to strong changes in optical properties and are widely used in rewritable optical disk technology. Herein, we demonstrate that thermally activated optical memory can be achieved via the nanostructural reconfiguration of a metallic nanowire metamaterial array made from a shape-memory alloy: A nickel-titanium film of nanoscale thickness structured on the subwavelength scale exhibits bistability of its optical properties upon temperature cycling between 30 °C and 210 °C. The structure, comprising an array of NiTi nanowires coated with a thin film of gold to enhance its plasmonic properties, can exist in two non-volatile states presenting an optical reflectivity differential of 12% via nanoscale mutual displacements of alternating nanowires in the structure. Such all-metal shape-memory photonic gratings and metamaterials may find applications in bistable optical devices.
metamaterial, grating, nanowire, reconfigurable nanostructure, shape memory alloy
0003-6951
Nagasaki, Yusuke
c73a679c-13cd-4c8a-a582-a0736cdfe937
Gholipour, Behrad
c17bd62d-9df6-40e6-bc42-65272d97e559
Ou, Jun-Yu
3fb703e3-b222-46d2-b4ee-75f296d9d64d
Tsuruta, Masanori
30671f6f-170e-40c0-a92f-02f4aaefda94
Plum, Eric
50761a26-2982-40df-9153-7aecc4226eb5
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Takahara, Junichi
dadc8464-3c2b-4123-88bd-3939b6f4dba7
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6
Nagasaki, Yusuke
c73a679c-13cd-4c8a-a582-a0736cdfe937
Gholipour, Behrad
c17bd62d-9df6-40e6-bc42-65272d97e559
Ou, Jun-Yu
3fb703e3-b222-46d2-b4ee-75f296d9d64d
Tsuruta, Masanori
30671f6f-170e-40c0-a92f-02f4aaefda94
Plum, Eric
50761a26-2982-40df-9153-7aecc4226eb5
MacDonald, Kevin F.
76c84116-aad1-4973-b917-7ca63935dba5
Takahara, Junichi
dadc8464-3c2b-4123-88bd-3939b6f4dba7
Zheludev, Nikolai
32fb6af7-97e4-4d11-bca6-805745e40cc6

Nagasaki, Yusuke, Gholipour, Behrad, Ou, Jun-Yu, Tsuruta, Masanori, Plum, Eric, MacDonald, Kevin F., Takahara, Junichi and Zheludev, Nikolai (2018) Optical bistability in shape-memory nanowire metamaterial array. Applied Physics Letters, 113, [021105]. (doi:10.1063/1.5025400).

Record type: Letter

Abstract

Non-volatile temperature-induced structural phase transitions such as those found in chalcogenide glasses are known to lead to strong changes in optical properties and are widely used in rewritable optical disk technology. Herein, we demonstrate that thermally activated optical memory can be achieved via the nanostructural reconfiguration of a metallic nanowire metamaterial array made from a shape-memory alloy: A nickel-titanium film of nanoscale thickness structured on the subwavelength scale exhibits bistability of its optical properties upon temperature cycling between 30 °C and 210 °C. The structure, comprising an array of NiTi nanowires coated with a thin film of gold to enhance its plasmonic properties, can exist in two non-volatile states presenting an optical reflectivity differential of 12% via nanoscale mutual displacements of alternating nanowires in the structure. Such all-metal shape-memory photonic gratings and metamaterials may find applications in bistable optical devices.

Text
Optical bistability in shape-memory nanowire metamaterial array_APL_accepted version - Accepted Manuscript
Download (988kB)

More information

Accepted/In Press date: 8 June 2018
e-pub ahead of print date: 13 July 2018
Keywords: metamaterial, grating, nanowire, reconfigurable nanostructure, shape memory alloy

Identifiers

Local EPrints ID: 421413
URI: http://eprints.soton.ac.uk/id/eprint/421413
ISSN: 0003-6951
PURE UUID: e5ec3447-a546-43f8-851c-638b50ef3963
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 Kevin F. MacDonald: ORCID iD orcid.org/0000-0002-3877-2976
ORCID for Nikolai Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 11 Jun 2018 16:30
Last modified: 17 Dec 2019 05:23

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×