Noble Gas Clusters and Nanoplasmas in High Harmonic Generation
arXiv:1510.09030 · doi:10.1016/j.nimb.2015.10.061
Abstract
We report a study of high harmonic generation from noble gas clusters of xenon atoms in a gas jet. Harmonic spectra were investigated as a function of backing pressure, showing spectral shifts due to the nanoplasma electrons in the clusters. At certain value of laser intensity this process may oppose the effect of the well-known ionization-induced blueshift. In addition, these cluster-induced harmonic redshifts may give the possibility to estimate cluster density and cluster size in the laser-gas jet interaction range.
5 pages, 4 figures