PHOTOELECTRON HOLOGRAPHY - IMPROVEMENTS TO ATOM IMAGE RECOVERY FROM EXPERIMENTAL-DATA

A multiple-wavenumber analysis method for scanned-angle photoelectron holography is refined to image the nearsurface atoms at a Cu(001) crys tal face. The atoms one layer above the emitter are imaged at the appr opriate location although shifted by 0.2 Angstrom. To strengthen this analysis, a comparison is made with a simple model which gives a simil ar result. A theoretical study is also presented that demonstrates why a holographic analysis scheme for scanned-angle diffraction patterns tends to preferentially image forward scattering atoms unlike scanned- energy variants of holographic atom imaging.