Phys. Rev. Lett. 98, 103902 (2007) [4 pages]Transition to the Relativistic Regime in High Order Harmonic GenerationReceived 4 August 2006; published 9 March 2007 Experiments and computer simulations on the generation of high order harmonics from steep plasma gradients using intense femtosecond laser pulses are presented. Qualitative changes in the harmonic emission take place when the intensities are increased above 1019 W/cm2 and/or the plasma scale length is varied. Good agreement between experimental and calculated spectra makes it possible to clearly distinguish between nonrelativistic and relativistic mechanisms of harmonic generation. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.103902
DOI:
10.1103/PhysRevLett.98.103902
PACS:
42.65.Ky, 52.27.Ny, 52.38.−r, 52.65.Rr
See AlsoComment: F. Quéré, C. Thaury, J-P. Geindre, and Ph. Martin, Comment on “Transition to the Relativistic Regime in High Order Harmonic Generation”, Phys. Rev. Lett. 100, 089401 (2008). Reply: Alexander Tarasevitch, Konstantin Lobov, Clemens Wünsche, and Dietrich von der Linde, Tarasevitch et al. Reply:, Phys. Rev. Lett. 100, 089402 (2008). |
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