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
We demonstrate a new concept for reconfigurable nanophotonic devices exploiting ultrafast nonlinear control of shaped wavefronts in a multimode nanomaterial consisting of semiconductor nanowires. Femtosecond pulsed laser excitation of the nanowire mat is shown to provide an efficient nonlinear mechanism to control both destructive and constructive interference in a shaped wavefront. Modulations of up to 63% are induced by optical pumping, due to a combination of multimode dephasing and induced transient absorption. We show that part of the nonlinear phase dynamics can be inverted to provide a dynamical revival of the wavefront into an optimized spot with up to 18% increase of the peak to background ratio caused by pulsed laser excitation. The concepts of multimode nonlinear switching demonstrated here are generally extendable to other photonic and plasmonic systems and enable new avenues for ultrafast and reconfigurable nanophotonic devices.
nanophotonics, nanowires, nonlinear optics, reconfigurable, ultrafast, wavefront shaping
e207
Strudley, Tom
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Bruck, Roman
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Mills, Ben
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Muskens, Otto L
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26 September 2014
Strudley, Tom
ad577d6a-d153-4b02-a7b2-2e4a37f05229
Bruck, Roman
6c0a8401-0a93-4497-bd42-665e5530cfcf
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
(2014)
An ultrafast reconfigurable nanophotonic switch using wavefront shaping of light in a nonlinear nanomaterial.
Light: Science & Applications, 3 (9), .
(doi:10.1038/lsa.2014.88).
Abstract
We demonstrate a new concept for reconfigurable nanophotonic devices exploiting ultrafast nonlinear control of shaped wavefronts in a multimode nanomaterial consisting of semiconductor nanowires. Femtosecond pulsed laser excitation of the nanowire mat is shown to provide an efficient nonlinear mechanism to control both destructive and constructive interference in a shaped wavefront. Modulations of up to 63% are induced by optical pumping, due to a combination of multimode dephasing and induced transient absorption. We show that part of the nonlinear phase dynamics can be inverted to provide a dynamical revival of the wavefront into an optimized spot with up to 18% increase of the peak to background ratio caused by pulsed laser excitation. The concepts of multimode nonlinear switching demonstrated here are generally extendable to other photonic and plasmonic systems and enable new avenues for ultrafast and reconfigurable nanophotonic devices.
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Published date: 26 September 2014
Keywords:
nanophotonics, nanowires, nonlinear optics, reconfigurable, ultrafast, wavefront shaping
Organisations:
Optoelectronics Research Centre, Quantum, Light & Matter Group
Identifiers
Local EPrints ID: 369481
URI: http://eprints.soton.ac.uk/id/eprint/369481
PURE UUID: 4d2e6044-3b26-42b5-ae4d-86c8f1616e50
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Date deposited: 01 Oct 2014 10:24
Last modified: 15 Mar 2024 03:34
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Contributors
Author:
Tom Strudley
Author:
Roman Bruck
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