Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Angular emission and polarization dependence of harmonics from laser–solid interactions
AU - Easter, J. H.
AU - Nees, John A.
AU - Hou, B. X.
AU - Mordovanakis, A.
AU - Mourou, G.
AU - Thomas, Alexander George Roy
AU - Krushelnick, Karl
PY - 2013/2/25
Y1 - 2013/2/25
N2 - Laser plasma interaction experiments have been performed to characterize high order harmonic emission up to the 18th order using high rep rate mJ level laser pulses at relativistic intensities. The experiments were compared to two- and three-dimensional particle-in-cell simulations. The harmonic divergence was found to be less than 4° (full-width at half-maximum) at highest intensity and increased as the laser was defocused (i.e. as the intensity was reduced). The polarization dependence on the harmonic generation efficiency and divergence was also measured. Circular polarization was found to cause a deflection in the angle of emission of the harmonics—an effect which may be beneficial in the use of such harmonics for efficient isolated attosecond pulse production.
AB - Laser plasma interaction experiments have been performed to characterize high order harmonic emission up to the 18th order using high rep rate mJ level laser pulses at relativistic intensities. The experiments were compared to two- and three-dimensional particle-in-cell simulations. The harmonic divergence was found to be less than 4° (full-width at half-maximum) at highest intensity and increased as the laser was defocused (i.e. as the intensity was reduced). The polarization dependence on the harmonic generation efficiency and divergence was also measured. Circular polarization was found to cause a deflection in the angle of emission of the harmonics—an effect which may be beneficial in the use of such harmonics for efficient isolated attosecond pulse production.
U2 - 10.1088/1367-2630/15/2/025035
DO - 10.1088/1367-2630/15/2/025035
M3 - Journal article
VL - 15
JO - New Journal of Physics
JF - New Journal of Physics
SN - 1367-2630
M1 - 025035
ER -