Numéro |
J. Phys. IV France
Volume 133, June 2006
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Page(s) | 479 - 485 | |
DOI | https://doi.org/10.1051/jp4:2006133098 | |
Publié en ligne | 16 juin 2006 |
J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 479-485
DOI: 10.1051/jp4:2006133098
Modulation of harmonic emission spectra from intense laser-plasma interactions
T.J.M. Boyd1 and R. Ondarza-Rovira21 Centre for Physics, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK
2 ININ, A.P. 18-1027, México 11801, D.F., Mexico
Abstract
We report results from a series of PIC simulations carried out to
investigate the interaction of intense laser light with overdense
plasma and in particular, aspects of the harmonic emission spectrum
generated in these interactions. Recent observations of emission in
this range by Watts et al. [1] show emission above the 20th
harmonic extending to the 37th with conversion efficiencies of order
10-6 with this spectrum showing distinct, if variable,
modulation of between two and four harmonics. This spectral feature
proved highly sensitive to the incident intensity, with more
pronounced modulation at higher intensities. These authors also
reported results from a set of model PIC simulations which showed a
modulated emission spectrum across the entire harmonic range, but
with a wider modulation bandwidth.
© EDP Sciences 2006