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Article Dans Une Revue Physical Review Letters Année : 2015

Plasma Luminescence from Femtosecond Filaments in Air: Evidence for Impact Excitation with Circularly Polarized Light Pulses

Sergey Mitryukovskiy
Yi Liu
  • Fonction : Auteur
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  • IdHAL : yi-liu
Pengji Ding
Aurélien Houard
André Mysyrowicz

Résumé

Filaments produced in air by intense femtosecond laser pulses emit UV luminescence from excited N2 and N+2 molecules. We report on a strong dependence at high intensities (I≥1.4×1014  W/cm2) of this luminescence with the polarization state of the incident laser pulses. We attribute this effect to the onset of new impact excitation channels from energetic electrons produced with circularly polarized laser pulses above a threshold laser intensity.
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Dates et versions

hal-01118358 , version 1 (18-02-2015)

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Sergey Mitryukovskiy, Yi Liu, Pengji Ding, Aurélien Houard, Arnaud Couairon, et al.. Plasma Luminescence from Femtosecond Filaments in Air: Evidence for Impact Excitation with Circularly Polarized Light Pulses. Physical Review Letters, 2015, 114, pp.63003. ⟨10.1103/PhysRevLett.114.063003⟩. ⟨hal-01118358⟩
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