Comment on "Direct photodetachment of F$^-$ by mid-infrared few-cycle femtosecond laser pulses"

TL;DR

This paper critiques a previous study on multiphoton detachment of F$^-$ ions by strong laser pulses, correcting theoretical errors and showing significant differences in the predicted photoelectron spectra and interference features.

Contribution

It identifies and corrects errors in the original theoretical calculations of F$^-$ detachment, providing revised predictions for photoelectron spectra.

Findings

Corrected the calculation of the detachment amplitude.

Revised photoelectron spectra show different interference patterns.

Highlights importance of accurate theoretical methods in strong-field ionization.

Abstract

Multiphoton detachment of F$^-$ by strong few-cycle laser pulses was studied by Shearer and Monteith using a Keldysh-type approach [Phys. Rev. A 88, 033415 (2013)]. We believe that this work contained errors in the calculation of the detachment amplitude and photoelectron spectra. We describe the necessary corrections to the theory and show that the results, in particular, the interference features of the photoelectron spectra, appear noticeably different.