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Femtosecond laser filaments in gold colloidal solutions: supercontinuum and ultrasonic tracing

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dc.contributor.authorSamokhvalov, A. A.
dc.contributor.authorGeints, Yu. E.
dc.contributor.authorAgeev, E. I.
dc.contributor.authorVeiko, V. P.
dc.contributor.authorKudryashov, S. I.
dc.date.accessioned2024-11-20T09:25:05Z
dc.date.available2024-11-20T09:25:05Z
dc.date.issued2019
dc.description.abstractFocused 100-femtosecond, 800-nanometer laser pulses with variable supercritical powers were fragmented into multiple millimeter-long filaments in pure water and gold nanoparticle (Au-NP) hydrosols of variable extinction coefficients. Power-dependent supercontinuum (SC), acquired at the blue shoulder of the laser pulses, overlapped with the Au-NP plasmon resonance, and as a result, it was damped by two orders of magnitude, rather than visibly enhanced by plasmonic NPs via non-linear light-NP interactions. Its damping factor increased with the increasing Au-NP extinction due to dissipative linear absorption of both the SC emission and pump-pulse attenuation in the colloidal solutions, with the latter process damping the underlying chi(3) interactions in the filaments. The minor optical extinction of the Au NPs at the 800-nanometer pump wavelength pertained to the filamentation process, with the overall dissipative losses ultrasonically probed via a thermoacoustic generation mechanism in terms of the peak laser power, exhibiting different absorption mechanisms for the pure water/diluted Au-NP hydrosols, and for the more concentrated colloids. (C) 2019 Optical Society of America
dc.format.extentС. 130;
dc.identifier.citationFemtosecond laser filaments in gold colloidal solutions: supercontinuum and ultrasonic tracing / Samokhvalov, AA [et al.] // Journal of the Optical Society of America B: Optical Physics. - 2019. - 36. - № 2. - P. 130;. - 10.1364/JOSAB.36.00A125
dc.identifier.doi10.1364/JOSAB.36.00A125
dc.identifier.urihttps://www.doi.org/10.1364/JOSAB.36.00A125
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85060846758&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000457457000019
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/16501
dc.relation.ispartofJournal of the Optical Society of America B: Optical Physics
dc.titleFemtosecond laser filaments in gold colloidal solutions: supercontinuum and ultrasonic tracing
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue2
oaire.citation.volume36
relation.isOrgUnitOfPublicationc8407a6f-7272-450d-8d99-032352c76b55
relation.isOrgUnitOfPublication.latestForDiscoveryc8407a6f-7272-450d-8d99-032352c76b55
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