Photoionization electron spectra in a system interacting with a neighboring atom

Abstract

Photoelectron ionization spectra of a system interacting with a neighbor two-level atom are investigated using the Laplace-transform method. These spectra are typically composed of several peaks. Photoelectron ionization spectra conditioned by the measurement on the two-level atom show oscillations at the Rabi frequency. The presence of spectral zeros occurring periodically with the Rabi period is predicted. This phenomenon is analyzed in detail.

Photoelectron spectra in an autoionization system interacting with a neighboring atom

“…These oscillations significantly influence conditional photoelectron spectra of the autoionization system. In these spectra, the so-called dynamical zeros occurring once per the Rabi period [19] have been found. Frequencies in photoelectron ionization spectra corresponding to both the Fano-like zeros (for weak optical pumping) and the dynamical zeros are studied using both analytical and numerical approaches.…”

“…A detailed analysis has shown [19] that the long-time intensity spectra I lt 0 and I lt 1 can be expressed in a specific form:…”

“…The system of differential equations (5) can be solved using the Laplace-transform method (for details, see [19]). The coefficients d 0 (E, t) and d 1 (E, t) of the solution then give the amplitude photoelectron ionization spectra of atom b conditioned by the presence of atom a in the ground and excited states, respectively.…”

“…The influence is assumed to have the form of energy transfer cased, e.g., by the dipole-dipole interaction. Compared to [19], we additionally assume one discrete bound (autoionizing) state present in the ionization system. Similarly as in [19], the neighbor atom is modelled as a twolevel system that undergoes Rabi oscillations in a stationary optical field.…”

“…Compared to [19], we additionally assume one discrete bound (autoionizing) state present in the ionization system. Similarly as in [19], the neighbor atom is modelled as a twolevel system that undergoes Rabi oscillations in a stationary optical field. These oscillations significantly influence conditional photoelectron spectra of the autoionization system.…”