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
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).
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
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
Catalogue record
Date deposited: 11 Jun 2018 16:30
Last modified: 16 Mar 2024 06:44
Export record
Altmetrics
Contributors
Author:
Yusuke Nagasaki
Author:
Behrad Gholipour
Author:
Jun-Yu Ou
Author:
Masanori Tsuruta
Author:
Eric Plum
Author:
Kevin F. MacDonald
Author:
Junichi Takahara
Author:
Nikolai Zheludev
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