Harmonic Generation from Laser-Irradiated Clusters
Plasma Physics
2009-11-13 v1 Optics
Abstract
The harmonic emission from cluster nanoplasmas subject to short, intense infrared laser pulses is analyzed by means of particle-in-cell simulations. A pronounced resonant enhancement of the low-order harmonic yields is found when the Mie plasma frequency of the ionizing and expanding cluster resonates with the respective harmonic frequency. We show that a strong, nonlinear resonant coupling of the cluster electrons with the laser field inhibits coherent electron motion, suppressing the emitted radiation and restricting the spectrum to only low-order harmonics. A pump-probe scheme is suggested to monitor the ionization dynamics of the expanding clusters.
Cite
@article{arxiv.0704.3401,
title = {Harmonic Generation from Laser-Irradiated Clusters},
author = {M. Kundu and S. V. Popruzhenko and D. Bauer},
journal= {arXiv preprint arXiv:0704.3401},
year = {2009}
}