Multiphoton ionization through the triplet states of Mg by linearly and circularly polarized laser pulses

TL;DR

This paper investigates multiphoton ionization of magnesium's triplet states using linearly and circularly polarized femtosecond laser pulses, employing theoretical models to analyze ionization yields and photoelectron spectra.

Contribution

It introduces a theoretical framework combining FCHFP and MP approaches to accurately model triplet states and solves time-dependent Schrödinger equations for ionization analysis.

Findings

Good agreement with existing data on state energies and dipole matrix elements

Calculation of total ionization yield and photoelectron energy spectra

Comparison of ionization processes under LP and CP laser pulses

Abstract

We theoretically study multiphoton ionization through the triplet states of Mg by linearly polarized (LP) and circularly polarized (CP) fs laser pulses. After the construction of the atomic basis using the frozen-core Hartree-Fock potential (FCHFP) as well as the model potential (MP) approaches for both singlet and triplet series which show rather good agreements with the existing data in terms of state energies and dipole matrix elements, we solve time-dependent Schr\"{o}dinger equations with $3s3p$ $^{3}P_{1}$ as an initial state, and calculate the total ionization yield and photoelectron energy spectra (PES).