All-optical guided-wave random laser in nematic liquid crystals
All-optical guided-wave random laser in nematic liquid crystals
Spatial solitons can affect and enhance random lasing in optically-pumped dyedoped nematic liquid crystals. Upon launching two collinear beams in the sample, the first to pump the fluorescent guest molecules and the second to induce a reorientational soliton, strikingly the second beam not only guides the emitted photons in the soliton waveguide, but also enhances the lasing efficiency and modulates its spectral width. By altering the scattering paths of the emitted photons, the soliton also contributes to the selection of the lasing modes, as further confirmed by the observed kinks in the input/output characteristics. These experimental results demonstrate that random lasing can be efficiently controlled by a light beam which does not interact with the gain molecules, opening a route towards light-controlled random lasers.
4672-4679
Perumbilavil, Sreekanth
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Piccardi, Armando
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Buchnev, Oleksandr
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Kauranen, Martti
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Strangi, Giuseppe
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Assanto, Gaetano
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21 February 2017
Perumbilavil, Sreekanth
d82bcbcf-494f-4c0c-8793-cc30110e66e2
Piccardi, Armando
745f16e1-faaa-4405-b99d-a1ecbfd9e582
Buchnev, Oleksandr
60cdb0d2-3388-47be-a066-61b3b396f69d
Kauranen, Martti
da1d2d57-cfbf-4800-9269-0c8fa14b16d9
Strangi, Giuseppe
5542ab91-92ae-4e1d-8074-31c24cf259fa
Assanto, Gaetano
c89823fa-c863-4ff3-aea0-915fa5852df2
Perumbilavil, Sreekanth, Piccardi, Armando, Buchnev, Oleksandr, Kauranen, Martti, Strangi, Giuseppe and Assanto, Gaetano
(2017)
All-optical guided-wave random laser in nematic liquid crystals.
Optics Express, 25 (5), .
(doi:10.1364/OE.25.004672).
Abstract
Spatial solitons can affect and enhance random lasing in optically-pumped dyedoped nematic liquid crystals. Upon launching two collinear beams in the sample, the first to pump the fluorescent guest molecules and the second to induce a reorientational soliton, strikingly the second beam not only guides the emitted photons in the soliton waveguide, but also enhances the lasing efficiency and modulates its spectral width. By altering the scattering paths of the emitted photons, the soliton also contributes to the selection of the lasing modes, as further confirmed by the observed kinks in the input/output characteristics. These experimental results demonstrate that random lasing can be efficiently controlled by a light beam which does not interact with the gain molecules, opening a route towards light-controlled random lasers.
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oe-25-5-4672
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Published date: 21 February 2017
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Local EPrints ID: 441696
URI: http://eprints.soton.ac.uk/id/eprint/441696
ISSN: 1094-4087
PURE UUID: 6d266462-ad20-4e39-8ca3-194ae26cda74
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Date deposited: 24 Jun 2020 16:30
Last modified: 16 Mar 2024 08:18
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Author:
Sreekanth Perumbilavil
Author:
Armando Piccardi
Author:
Oleksandr Buchnev
Author:
Martti Kauranen
Author:
Giuseppe Strangi
Author:
Gaetano Assanto
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