Photoelectron spectra in an autoionization system interacting with a neighboring atom

TL;DR

This paper derives a formula for long-time photoelectron spectra in an autoionization system interacting with a neighboring atom, revealing multiple peaks, Fano-like zeros, and oscillations at the Rabi frequency.

Contribution

It introduces a new analytical formula for ionization spectra considering atom interactions, identifying spectral zeros and oscillatory behaviors.

Findings

Spectra can have up to eight peaks.

Fano-like zeros are present in weak pumping regimes.

Spectra exhibit Rabi-frequency oscillations and dynamical zeros.

Abstract

Photoelectron ionization spectra of an autoionization system with one discrete level interacting with a neighbor two-level atom are discussed. The formula for long-time ionization spectra is derived. According to this formula, the spectra can be composed of up to eight peaks. Moreover, the Fano-like zeros for weak optical pumping have been identified in these spectra. The conditional ionization spectra depending on the state of the neighbor atom exhibit oscillations at the Rabi frequency. Dynamical spectral zeros occurring once per the Rabi period have been revealed in these spectra.