Time-Reversed Internal-Source Holography

Abstract

We have derived an expression for incident-beam-induced fine structures at a local site. We show that using time-reversal arguments, local incident-beam-induced fine structures are equivalent to photoelectron holography with an isotropic reference wave. We suggest that positron-beam-induced desorption or Auger fine structures offer attractive alternatives to using electron beams because the positron-atom scattering factor contains less angular anisortropy and the multiple scattering is weaker.