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An ultrafast reconfigurable nanophotonic switch using wavefront shaping of light in a nonlinear nanomaterial

An ultrafast reconfigurable nanophotonic switch using wavefront shaping of light in a nonlinear nanomaterial
An ultrafast reconfigurable nanophotonic switch using wavefront shaping of light in a nonlinear nanomaterial
Wavefront shaping of light fields has opened up a wealth of new applications in imaging and communication in highly multimode environments [1-11]. By mixing of the modes with optimized phases and amplitudes it is possible to focus light through - or even inside - opaque scattering media [1,2]. Here we present work demonstrating ultrafast control of such an optimized wavefront transmitted through a dense disordered mat of semiconductor nanowires by exploiting their inherent nonlinearity. Modulations of the peak intensity of up to 63% (4.3 dB) are induced by optical pumping as a result of a combination of multimode dephasing and induced absorption. Next to ultrafast dephasing of the shaped field, we show that it is possible to dynamically rephase the light fields into an optimized spot by means of pulsed nonlinear excitation of the medium. We obtain an enhancement of the peak to background ratio of the optimized spot resulting from rephasing of up to 18%. While our results are obtained for three dimensional media, the concepts of multimode nonlinear switching are generally extendable to other systems, including plasmonic and photonic waveguides, thus enabling new avenues for ultrafast and reconfigurable nanophotonic devices.
2-6
Strudley, Tom
ad577d6a-d153-4b02-a7b2-2e4a37f05229
Bruck, Roman
a7f248d7-bcb6-4f5d-b388-deb4bab13bb0
Mills, Ben
05f1886e-96ef-420f-b856-4115f4ab36d0
Muskens, Otto L.
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
Strudley, Tom
ad577d6a-d153-4b02-a7b2-2e4a37f05229
Bruck, Roman
a7f248d7-bcb6-4f5d-b388-deb4bab13bb0
Mills, Ben
05f1886e-96ef-420f-b856-4115f4ab36d0
Muskens, Otto L.
2284101a-f9ef-4d79-8951-a6cda5bfc7f9

Strudley, Tom, Bruck, Roman, Mills, Ben and Muskens, Otto L. (2013) An ultrafast reconfigurable nanophotonic switch using wavefront shaping of light in a nonlinear nanomaterial. Pre-print, (arXiv:1312.0267), 2-6.

Record type: Article

Abstract

Wavefront shaping of light fields has opened up a wealth of new applications in imaging and communication in highly multimode environments [1-11]. By mixing of the modes with optimized phases and amplitudes it is possible to focus light through - or even inside - opaque scattering media [1,2]. Here we present work demonstrating ultrafast control of such an optimized wavefront transmitted through a dense disordered mat of semiconductor nanowires by exploiting their inherent nonlinearity. Modulations of the peak intensity of up to 63% (4.3 dB) are induced by optical pumping as a result of a combination of multimode dephasing and induced absorption. Next to ultrafast dephasing of the shaped field, we show that it is possible to dynamically rephase the light fields into an optimized spot by means of pulsed nonlinear excitation of the medium. We obtain an enhancement of the peak to background ratio of the optimized spot resulting from rephasing of up to 18%. While our results are obtained for three dimensional media, the concepts of multimode nonlinear switching are generally extendable to other systems, including plasmonic and photonic waveguides, thus enabling new avenues for ultrafast and reconfigurable nanophotonic devices.

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More information

e-pub ahead of print date: 1 December 2013
Organisations: Optoelectronics Research Centre, Physics & Astronomy

Identifiers

Local EPrints ID: 369387
URI: http://eprints.soton.ac.uk/id/eprint/369387
PURE UUID: ca9d546c-a654-457d-8962-944bad3af4c2
ORCID for Ben Mills: ORCID iD orcid.org/0000-0002-1784-1012
ORCID for Otto L. Muskens: ORCID iD orcid.org/0000-0003-0693-5504

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Date deposited: 25 Sep 2014 10:36
Last modified: 30 Jul 2019 00:34

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Contributors

Author: Tom Strudley
Author: Roman Bruck
Author: Ben Mills ORCID iD
Author: Otto L. Muskens ORCID iD

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