Harmonic Generation from Laser-Irradiated Clusters

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.

4 pages, ReVTeX4

References in corpus (3)

• Nonlinear resonance absorption in laser-cluster interaction
• Dynamical ionization ignition of clusters in intense and short laser pulses
• Collisionless energy absorption in the short-pulse intense laser-cluster interaction

Cited by in corpus (6)

• Harmonic emission from cluster nanoplasmas subject to intense short laser pulses
• Optimizing the ionization and energy absorption of laser-irradiated clusters
• Long-lasting XUV activation of helium nanodroplets for avalanche ionization
• Single-shot electron imaging of dopant-induced nanoplasmas
• Dynamical resonance shift and unification of resonances in short-pulse laser cluster interaction
• Harmonics Generation in Ultra-Thin Nanofilms Irradiated by Intense Nonrelativistic Short Laser Pulse