Beaming random lasers with soliton control
Beaming random lasers with soliton control
Random lasers are resonator-less light sources where feedback stems from recurrent scattering at the expense of spatial profile and directionality. Suitably-doped nematic liquid crystals can random lase when optically pumped near resonance(s); moreover, through molecular reorientation within the transparency region, they support self-guided optical spatial solitons, i.e., light-induced waveguides. Here, we synergistically combine solitons and collinear pumping in weakly scattering dye-doped nematic liquid crystals, whereby random lasing and self-confinement concur to beaming the emission, with several improved features: all-optical switching driven by a low-power input, laser directionality and smooth output profile with high-conversion efficiency, externally controlled angular steering. Such effects make soliton-assisted random lasers an outstanding route towards application-oriented random lasers.
Perumbilavil, Sreekanth
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Piccardi, Armando
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Barboza, Raouf
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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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1 December 2018
Perumbilavil, Sreekanth
d82bcbcf-494f-4c0c-8793-cc30110e66e2
Piccardi, Armando
745f16e1-faaa-4405-b99d-a1ecbfd9e582
Barboza, Raouf
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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, Barboza, Raouf, Buchnev, Oleksandr, Kauranen, Martti, Strangi, Giuseppe and Assanto, Gaetano
(2018)
Beaming random lasers with soliton control.
Nature Communications, 9 (1), [3863].
(doi:10.1038/s41467-018-06170-9).
Abstract
Random lasers are resonator-less light sources where feedback stems from recurrent scattering at the expense of spatial profile and directionality. Suitably-doped nematic liquid crystals can random lase when optically pumped near resonance(s); moreover, through molecular reorientation within the transparency region, they support self-guided optical spatial solitons, i.e., light-induced waveguides. Here, we synergistically combine solitons and collinear pumping in weakly scattering dye-doped nematic liquid crystals, whereby random lasing and self-confinement concur to beaming the emission, with several improved features: all-optical switching driven by a low-power input, laser directionality and smooth output profile with high-conversion efficiency, externally controlled angular steering. Such effects make soliton-assisted random lasers an outstanding route towards application-oriented random lasers.
Text
s41467-018-06170-9
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Accepted/In Press date: 6 August 2018
e-pub ahead of print date: 21 September 2018
Published date: 1 December 2018
Identifiers
Local EPrints ID: 423813
URI: http://eprints.soton.ac.uk/id/eprint/423813
PURE UUID: d65734ae-5b89-4738-9d6d-7da58a0e237e
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Date deposited: 02 Oct 2018 16:30
Last modified: 05 Jun 2024 18:36
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Contributors
Author:
Sreekanth Perumbilavil
Author:
Armando Piccardi
Author:
Raouf Barboza
Author:
Oleksandr Buchnev
Author:
Martti Kauranen
Author:
Giuseppe Strangi
Author:
Gaetano Assanto
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