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Optically reconfigurable metasurfaces and photonic devices based on phase change materials

Optically reconfigurable metasurfaces and photonic devices based on phase change materials
Optically reconfigurable metasurfaces and photonic devices based on phase change materials
Photonic components with adjustable parameters, such as variable-focal-length lenses or spectral filters, which can change functionality upon optical stimulation, could offer numerous useful applications. Tuning of such components is conventionally achieved by either micro- or nanomechanical actuation of their constituent parts, by stretching or by heating. Here, we report a novel approach for making reconfigurable optical components that are created with light in a non-volatile and reversible fashion. Such components are written, erased and rewritten as two-dimensional binary or greyscale patterns into a nanoscale film of phase-change material by inducing a refractive-index-changing phase transition with tailored trains of femtosecond pulses. We combine germanium–antimony–tellurium-based films with a diffraction-limited resolution optical writing process to demonstrate a variety of devices: visible-range reconfigurable bichromatic and multi-focus Fresnel zone plates, a super-oscillatory lens with subwavelength focus, a greyscale hologram, and a dielectric metamaterial with on-demand reflection and transmission resonances.
1749-4885
60-65
Wang, Qian
55f8a112-bd52-4444-a5ba-88f920bd9a75
Rogers, Edward T.F.
b92cc8ab-0d91-4b2e-b5c7-8a2f490a36a2
Gholipour, Behrad
c17bd62d-9df6-40e6-bc42-65272d97e559
Wang, Chih-Ming
08d8437a-7e64-465f-8eca-e781ed84e900
Yuan, Guanghui
49a8e7ed-93a5-4a5a-ad81-e4326a9f7c4c
Teng, Jinghua
ee2f6ca3-8daf-420b-a835-030b2bd3a875
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Wang, Qian
55f8a112-bd52-4444-a5ba-88f920bd9a75
Rogers, Edward T.F.
b92cc8ab-0d91-4b2e-b5c7-8a2f490a36a2
Gholipour, Behrad
c17bd62d-9df6-40e6-bc42-65272d97e559
Wang, Chih-Ming
08d8437a-7e64-465f-8eca-e781ed84e900
Yuan, Guanghui
49a8e7ed-93a5-4a5a-ad81-e4326a9f7c4c
Teng, Jinghua
ee2f6ca3-8daf-420b-a835-030b2bd3a875
Zheludev, Nikolay I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Wang, Qian, Rogers, Edward T.F., Gholipour, Behrad, Wang, Chih-Ming, Yuan, Guanghui, Teng, Jinghua and Zheludev, Nikolay I. (2016) Optically reconfigurable metasurfaces and photonic devices based on phase change materials. Nature Photonics, 10, 60-65. (doi:10.1038/NPHOTON.2015.247).

Record type: Article

Abstract

Photonic components with adjustable parameters, such as variable-focal-length lenses or spectral filters, which can change functionality upon optical stimulation, could offer numerous useful applications. Tuning of such components is conventionally achieved by either micro- or nanomechanical actuation of their constituent parts, by stretching or by heating. Here, we report a novel approach for making reconfigurable optical components that are created with light in a non-volatile and reversible fashion. Such components are written, erased and rewritten as two-dimensional binary or greyscale patterns into a nanoscale film of phase-change material by inducing a refractive-index-changing phase transition with tailored trains of femtosecond pulses. We combine germanium–antimony–tellurium-based films with a diffraction-limited resolution optical writing process to demonstrate a variety of devices: visible-range reconfigurable bichromatic and multi-focus Fresnel zone plates, a super-oscillatory lens with subwavelength focus, a greyscale hologram, and a dielectric metamaterial with on-demand reflection and transmission resonances.

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e-pub ahead of print date: 21 December 2015
Published date: 1 January 2016
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 386342
URI: http://eprints.soton.ac.uk/id/eprint/386342
ISSN: 1749-4885
PURE UUID: 821aed3a-3a71-457a-829f-39ddbaca07b2
ORCID for Nikolay I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 22 Jan 2016 16:50
Last modified: 17 Dec 2019 02:01

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