Photoemission Electron Microscope (GELEM) /PM3

The PEEM instrument operated by the German-Eastern European LAboratory for Energy and MAteriels Research (GELEM) is designed both for a basic surface characterization with Hg-lamp excitation (offline) and absorption studies (XAS) with lateral resolution using synchrotron radiation (at a beamline).

The PM3 beamline merges the developments of the former BESSY I SX700 III monochromator for elliptically polarized VUV radiation and of BESSY II collimated plane grating monochromators. This way it is possible to achieve circular polarization from a BESSY II dipole in the range 20 – 2000 eV with high photon flux, high energy resolution and high stability.

Selected Applications:

• Surface quality and structure characterization using work-function contrast
• Step-by-step observation of a surface oxidation process
• Monitor surface structure differences for modified molecular overlayers
• Absorption spectroscopy with lateral resolution: image of surface distribution of a selected chemical state, absorption spectra from selected areas on the sample surface

The GELEM-PEEM station in waiting position.