Photoelectron circular dichroism in the multiphoton ionization by short laser pulses: II. Three- and four-photon ionization of fenchone and camphor

TL;DR

This study uses the TDSC method to analyze angle-resolved multiphoton ionization of fenchone and camphor, revealing detailed PECD behavior and predicting enhanced PECD in oriented molecules, aligning well with experimental data.

Contribution

It provides detailed computational analysis of PECD in three- and four-photon ionization of fenchone and camphor, including predictions for oriented molecules, advancing understanding of chiroptical effects.

Findings

Good agreement with experimental PECD data

Significant PECD enhancement in uniaxially-oriented molecules

Detailed insight into multiphoton ionization processes

Abstract

Angle-resolved multiphoton ionization of fenchone and camphor by short intense laser pulses is computed by the time-dependent Single Center (TDSC) method. Thereby, the photoelectron circular dichroism (PECD) in the three-photon resonance enhanced ionization and four-photon above-threshold ionization of these molecules is investigated in detail. The computational results are in a satisfactory agreement with the available experimental data, measured for randomly-oriented fenchone and camphor molecules at different wavelengths of the exciting pulses. We predict a significant enhancement of the multiphoton PECD for uniaxially-oriented fenchone and camphor.