Photoelectron spectra of atom in debye plasma using femtosecond laser

Photoelectron spectra (PES) of the atom are investigated in a Debye plasma environment using an intense, linearly polarized femtosecond (fs) pulsed laser. In the strong field approximation, for a single active electron, the three-dimensional nonrelativistic time-dependent Schrödinger equation is solved numerically by the Crank–Nicolson method. PES is investigated for different Debye lengths (5[Formula: see text]a.u.,10[Formula: see text]a.u. and 15[Formula: see text]a.u.) using the infinite surface flux method, and a shift in the peak positions is observed. PES in the plasma environment for various laser pulse cycles ([Formula: see text], 20 and 30) is also analyzed. Momentum-resolved PES shows the increase in the radius of the above-threshold ionization (ATI) rings due to the plasma screening effect.