The Effect of Chirped Intense Femtosecond Laser Pulses on the Argon Cluster

Abstract

The interaction of intense femtosecond laser pulses with atomic Argon clusters has been investigated by using nano-plasma model. Based on the dynamic simulations, ionization process, heating and expansion of a cluster after irradiation by femtosecond laser pulses at intensities up to 2×10 17 Wcm -2 are studied. The analytical calculation provides ionization ratefor different mechanisms and time evolution of the density of electrons for different pulse shapes. In this approach the strong dependence of laser intensity, pulse duration and laser shape on the electron energy, the electron density and the cluster size are presented using the intense chirped laser pulses. Based on the presented theoretical modifications, the effect of chirped laser pulse on the complex dynamical process of the interaction is studied. It is found that the energy of electrons and the radius of cluster for the negatively chirped pulsesare improved up to 20% in comparison to the unchirped and positively chirped pulses.

Investigating Xenon Aggregates Irradiated by Intense Attosecond Laser Pulses

“…This model can deal with all the processes of ionization, heating, electron emission and the process of expansion of the cluster. Thus, we will study the interaction of an intense attosecond laser with the xenon aggregate (3.10 6 atoms) using the nanoplasma model to highlight the effect of wavelength and laser intensity on the different nanoplasma parameters [12][13][14][15][16][17][18][19][20].…”