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Conical versus Gaussian terahertz emission from two-color laser-induced air plasma filaments

hal.structure.identifierDepartment of Materials and Production [Aalborg]
dc.contributor.authorSØRENSEN, Christian
hal.structure.identifierDepartment of Materials and Production [Aalborg]
dc.contributor.authorSØRENSEN, Christian Buhl
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorGUIRAMAND, Léo
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorDEGERT, Jérôme
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorTONDUSSON, Marc
hal.structure.identifierDepartment of Materials and Production [Aalborg]
dc.contributor.authorSKOVSEN, Esben
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorFREYSZ, Eric
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorABRAHAM, Emmanuel
dc.date.issued2020
dc.identifier.issn0146-9592
dc.description.abstractEnWe demonstrate that the far-field terahertz beam generated from a Ti:Sapphire two-color laser-induced filament can exhibit a conical or Gaussian distribution depending on the filtering experimental conditions. Using both an incoherent Golay cell detector and a twodimensional coherent electro-optic detection covering the 0.2-3 THz spectral range, in our experimental conditions, we provide evidences that the conical emission is due to photoinduced carriers in the silicon filter typically used to block the remaining pump laser light. Moreover, the terahertz beam retrieves an almost TEM 00 Gaussian spatial distribution when the silicon filter is preceded by a large bandgap ceramic filter, which stops the pump beam preventing carriers generation in the silicon filter.
dc.language.isoen
dc.publisherOptical Society of America - OSA Publishing
dc.subject.enOCIS codes: (110.6795) Terahertz imaging
dc.subject.en(300.6495) Spectroscopy
dc.subject.enterahertz
dc.subject.en(350.5400) Plasmas
dc.subject.en(140.3295) Laser beam characterization. 2
dc.title.enConical versus Gaussian terahertz emission from two-color laser-induced air plasma filaments
dc.typeArticle de revue
dc.identifier.doi10.1364/OL.390112
dc.subject.halSciences de l'ingénieur [physics]/Optique / photonique
dc.subject.halPhysique [physics]/Physique [physics]/Optique [physics.optics]
bordeaux.journalOptics Letters
bordeaux.page2132
bordeaux.volume45
bordeaux.issue7
bordeaux.peerReviewedoui
hal.identifierhal-03065559
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03065559v1
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