Theoretical aspects of electron emission holography

A new surface structure determination approach, called either photoelectron or Auger electron holography depending on the process under consideration, to get three-dimensional images of the close vicinity of a given near-surface atom emitter, has recently been developed. The great advantage of this holographic method lies in the knowledge of the reference wave, a point which is not shared by structure determination approaches using an external beam of particles, such as e.g. x-ray and neutron diffractions, where the reference wave is lost into some direction which is not observed, and the experimenter is therefore faced with the so-called 'phase problem'. 28 refs, 2 figs