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Ultrafast dephasing of light in strongly scattering GaP nanowires

Ultrafast dephasing of light in strongly scattering GaP nanowires
Ultrafast dephasing of light in strongly scattering GaP nanowires
We demonstrate ultrafast dephasing in the random transport of light through a layer consisting of strongly scattering GaP nanowires. Dephasing results in a nonlinear intensity modulation of individual pseudomodes which is 100 times larger than that of bulk GaP. Different contributions to the nonlinear response are separated using total transmission, white-light frequency correlation, and statistical pseudomode analysis. A dephasing time of 1.2±0.2 ps is found. Quantitative agreement is obtained with numerical model calculations which include photoinduced absorption and deformation of individual scatterers. Nonlinear dephasing of photonic eigenmodes opens up avenues for ultrafast control of random lasers, nanophotonic switches, and photon localization.
Abb, Martina
d1aa3add-7761-4c4f-8a3d-7da3084deb33
Bakkers, Erik P.A.M.
629835c0-32a2-4796-bfb9-94c61e74aef8
Muskens, Otto L.
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
Abb, Martina
d1aa3add-7761-4c4f-8a3d-7da3084deb33
Bakkers, Erik P.A.M.
629835c0-32a2-4796-bfb9-94c61e74aef8
Muskens, Otto L.
2284101a-f9ef-4d79-8951-a6cda5bfc7f9

Abb, Martina, Bakkers, Erik P.A.M. and Muskens, Otto L. (2011) Ultrafast dephasing of light in strongly scattering GaP nanowires. Physical Review Letters, 106 (14). (doi:10.1103/PhysRevLett.106.143902).

Record type: Article

Abstract

We demonstrate ultrafast dephasing in the random transport of light through a layer consisting of strongly scattering GaP nanowires. Dephasing results in a nonlinear intensity modulation of individual pseudomodes which is 100 times larger than that of bulk GaP. Different contributions to the nonlinear response are separated using total transmission, white-light frequency correlation, and statistical pseudomode analysis. A dephasing time of 1.2±0.2 ps is found. Quantitative agreement is obtained with numerical model calculations which include photoinduced absorption and deformation of individual scatterers. Nonlinear dephasing of photonic eigenmodes opens up avenues for ultrafast control of random lasers, nanophotonic switches, and photon localization.

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Published date: April 2011

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Local EPrints ID: 180997
URI: https://eprints.soton.ac.uk/id/eprint/180997
PURE UUID: dcf5204b-6ad7-45c4-a1f1-29c2d8104f84
ORCID for Otto L. Muskens: ORCID iD orcid.org/0000-0003-0693-5504

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Date deposited: 13 Apr 2011 14:30
Last modified: 29 Oct 2019 01:44

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Author: Martina Abb
Author: Erik P.A.M. Bakkers
Author: Otto L. Muskens ORCID iD

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