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| Naji, M. |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Petrov, R. H. | Madrid |
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| Kočí, Jan | Prague |
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| Azevedo, Nuno Monteiro |
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Gholipour, Behrad
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Topics
Publications (11/11 displayed)
- 2018Optical bistability in shape-memory nanowire metamaterial arraycitations
- 2017Merging metamaterial and optical fiber technologies
- 2017Fibre-coupled photonic metadevices
- 2016Lithography assisted fiber-drawing nanomanufacturingcitations
- 2015Amorphous metal-sulphide microfibers enable photonic synapses for brain-like computingcitations
- 2014Optical and electronic properties of bismuth-implanted glassescitations
- 2014n-type chalcogenides by ion implantationcitations
- 2014n-type chalcogenides by ion implantation.citations
- 2013On the analogy between photoluminescence and carrier-type reversal in Bi- and Pb-doped glasses ; Analogie mezi fotoluminescencí a změnou typu vodivosti v Bi- a Pb-dotovaných sklechcitations
- 2013On the analogy between photoluminescence and carrier-type reversal in Bi-and Pb-doped glassescitations
- 2010Metamaterial electro-optic switch of nanoscale thicknesscitations
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article
Optical bistability in shape-memory nanowire metamaterial array
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.