Above Threshold Ionization spectra for Debye plasma embedded atom interacting with femtosecond laser pulse

Abstract

Investigation has been made to realize the effect of femtosecond Gaussian laser pulse interaction with atom embedded in Debye plasma. An ab-intio simulation has been performed using the accurate Crank-Nicholson technique for solving the time-dependent Schrodinger equation in space and time. The effect of femtosecond pulse is simulated by varying the field strength and Debye length, which results from single to Multiphoton processes. The complex behavior of ground, excited states, and ionization probabilities have been studied at different laser intensities. Both off-resonant and near-resonant cases of laser frequency with respect to the bound states of the system have been considered. A point worth mentioning is that the effect of plasma, at various temperature, on Above-Threshold-Ionization spectra due to the absorption of photons in the continuum is also shown. The present work will be useful in advancing the potential technology of imaging and steering of electronic dynamics, on the femtosecond time scale.