A cold electron emission spectrum in a low-frequency laser field

TL;DR

This paper extends classical theories to analyze cold electron emission spectra in low-frequency laser fields, incorporating rescattering effects, and finds that the spectra resemble atomic ATI spectra and experimental data.

Contribution

It introduces a modified model for electron emission spectra considering rescattering, extending Fowler-Nordheim theory and the Simplemen model.

Findings

Electron spectra resemble atomic ATI spectra.

Numerical simulations match experimental surface emission data.

Rescattering significantly influences emission spectra.

Abstract

We consider the process of cold emission of electrons from a metal in a strong low-frequency laser field. An expression is obtained for the electron spectrum with allowance for their rescattering at the metal surface as a result of an extension of the Fowler-Nordheim theory and modification of the Simplemen model. The numerically simulated features of the electron spectrum are similar to the ATI spectra for atoms and have the same form as the experimental surface emission dependencies for a metal.