dc.contributor.authorNagasaki, Yusuke
dc.contributor.authorGholipour, Behrad
dc.contributor.authorOu, Jun-Yu
dc.contributor.authorTsuruta, Masanori
dc.contributor.authorPlum, Eric
dc.contributor.authorMacDonald, Kevin F.
dc.contributor.authorTakahara, Junichi
dc.contributor.authorZheludev, Nikolay I.
dc.identifier.citationNagasaki, Y., Gholipour, B., Ou, J.-Y., Tsuruta, M., Plum, E., MacDonald, K. F., . . . Zheludev, N. I. (2018). Optical bistability in shape-memory nanowire metamaterial array. Applied Physics Letters, 113(2), 021105-. doi:10.1063/1.5025400en_US
dc.description.abstractNon-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.en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.format.extent4 p.en_US
dc.relation.ispartofseriesApplied Physics Lettersen_US
dc.rights© 2018 The Author(s). All rights reserved. This paper was published by AIP Publishing in Applied Physics Letters and is made available with permission of The Author(s).en_US
dc.subjectOptical Bistabilityen_US
dc.titleOptical bistability in shape-memory nanowire metamaterial arrayen_US
dc.typeJournal Article
dc.contributor.researchCentre for Disruptive Photonic Technologiesen_US
dc.contributor.researchThe Photonics Instituteen_US
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.description.versionPublished versionen_US

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