Resonant Anisotropic Emission in Two-Photon Interferometric Spectroscopy

POSTER

Abstract

A variant of RABBITT spectroscopy, in which the attosecond-pulse train comprises just two consecutive harmonics of the fundamental infrared probe frequency, is explored to measure time-resolved photoelectron emission in systems that exhibit autoionizing states [1]. In this scheme, one-photon and two-photon amplitudes interfere giving rise to asymmetric photoemission. It is shown that the group delay of both one-photon and two-photon resonant transitions is directly encoded in the energy-resolved photoelectron anisotropy as a function of the pump-probe time-delay. This principle is illustrated using a one-dimensional model with a symmetric zero-range potential that supports bound states and shape-resonances. The asymmetric photoelectron emission near a resonance is computed using perturbation theory and by solving the time-dependent Schoedinger equation. [1] Bejan Ghomashi, Nicolas Douguet, and Luca Argenti arXiv:1811.10160 (2019)

Authors

  • Nicolas Douguet

    University of Central Florida, Department of Physics, University of Central Florida

  • Bejan Ghomashi

    University of Central Florida

  • Luca Argenti

    CREOL and Phys. Dept., University of Central Florida, Dep. Physics and CREOL at the University of Central Florida, Department of Physics and CREOL, University of Central Florida, Dept of Physics and CREOL at the University of Central Florida, University of Central Florida