The University of Southampton
University of Southampton Institutional Repository

All-optical dynamic focusing of light via coherent absorption in a plasmonic metasurface

All-optical dynamic focusing of light via coherent absorption in a plasmonic metasurface
All-optical dynamic focusing of light via coherent absorption in a plasmonic metasurface
Vision, microscopy, imaging, optical data projection and storage all depend on focusing of light. Dynamic focusing is conventionally achieved with mechanically reconfigurable lenses, spatial light modulators or microfluidics. Here we demonstrate that dynamic control of focusing can be achieved through coherent interaction of optical waves on a thin beam splitter. We use a nanostructured plasmonic metasurface of subwavelength thickness as the beam splitter, allowing operation in the regimes of coherent absorption and coherent transparency. Focusing of light resulting from illumination of the plasmonic metasurface with a Fresnel zone pattern is controlled by another patterned beam projected on the same metasurface. By altering the control pattern, its phase, or its intensity, we switch the lens function on and off, and alter the focal spot’s depth, diameter and intensity. Switching occurs as fast as the control beam is modulated and therefore tens of gigahertz modulation bandwidth is possible with electro-optical modulators, which is orders of magnitude faster than conventional dynamic focusing technologies.
metasurfaces, coherent control, all-optical dynamic focusing, coherent perfect absorption
Papaioannou, Maria
489b597a-22af-42bb-9637-a5dbe55553fb
Plum, Eric
50761a26-2982-40df-9153-7aecc4226eb5
Rogers, Edward T.F.
b92cc8ab-0d91-4b2e-b5c7-8a2f490a36a2
Zheludev, Nikolai I.
32fb6af7-97e4-4d11-bca6-805745e40cc6
Papaioannou, Maria
489b597a-22af-42bb-9637-a5dbe55553fb
Plum, Eric
50761a26-2982-40df-9153-7aecc4226eb5
Rogers, Edward T.F.
b92cc8ab-0d91-4b2e-b5c7-8a2f490a36a2
Zheludev, Nikolai I.
32fb6af7-97e4-4d11-bca6-805745e40cc6

Papaioannou, Maria, Plum, Eric, Rogers, Edward T.F. and Zheludev, Nikolai I. (2018) All-optical dynamic focusing of light via coherent absorption in a plasmonic metasurface. Light: Science & Applications, 7 (3), [17157]. (doi:10.1038/lsa.2017.157).

Record type: Article

Abstract

Vision, microscopy, imaging, optical data projection and storage all depend on focusing of light. Dynamic focusing is conventionally achieved with mechanically reconfigurable lenses, spatial light modulators or microfluidics. Here we demonstrate that dynamic control of focusing can be achieved through coherent interaction of optical waves on a thin beam splitter. We use a nanostructured plasmonic metasurface of subwavelength thickness as the beam splitter, allowing operation in the regimes of coherent absorption and coherent transparency. Focusing of light resulting from illumination of the plasmonic metasurface with a Fresnel zone pattern is controlled by another patterned beam projected on the same metasurface. By altering the control pattern, its phase, or its intensity, we switch the lens function on and off, and alter the focal spot’s depth, diameter and intensity. Switching occurs as fast as the control beam is modulated and therefore tens of gigahertz modulation bandwidth is possible with electro-optical modulators, which is orders of magnitude faster than conventional dynamic focusing technologies.

Text
All-optical dynamic focusing of light via coherent absorption in a plasmonic metasurface (accepted manuscript including supplementary information) - Accepted Manuscript
Available under License Creative Commons Attribution.
Download (4MB)
Text
lsa2017157 - Version of Record
Available under License Creative Commons Attribution.
Download (2MB)

More information

Accepted/In Press date: 11 November 2017
e-pub ahead of print date: 16 November 2017
Published date: March 2018
Keywords: metasurfaces, coherent control, all-optical dynamic focusing, coherent perfect absorption

Identifiers

Local EPrints ID: 419271
URI: http://eprints.soton.ac.uk/id/eprint/419271
PURE UUID: 387e2aed-60ec-436c-984d-d745b764dfce
ORCID for Maria Papaioannou: ORCID iD orcid.org/0000-0002-5078-0514
ORCID for Eric Plum: ORCID iD orcid.org/0000-0002-1552-1840
ORCID for Nikolai I. Zheludev: ORCID iD orcid.org/0000-0002-1013-6636

Catalogue record

Date deposited: 09 Apr 2018 16:31
Last modified: 27 Jan 2020 13:43

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.

×