Abstract
An experimental study has been carried out on high-order harmonic generation from the interaction of Ti:sapphire laser pulses with low-excited silver plasma plumes. The dependence of high-order harmonic intensity on the plasma plume length shows slower than quadratic scaling with “”, 0.8, and 0.7 for 21st, 33rd, and 41st harmonics, respectively. The harmonic intensity is observed to decrease with increasing harmonic order, and this decrease is faster for longer plasma plumes. The results are explained from physical considerations of phase mismatch between the driving laser pulse and the harmonic radiation during propagation, and reabsorption of the harmonic radiation in the plasma plume.
- Received 30 September 2008
- Corrected 9 February 2009
DOI:https://doi.org/10.1103/PhysRevA.79.023807
©2009 American Physical Society
Corrections
9 February 2009