Abstract

VUV and soft x-ray vuv lasers allow higher resolution photoelectron spectroscopy of solids than is now possible. Currently, the best resolution (incident photon and analyzed electron), of the order of 10 meV, has been achieved with line sources, which allow very little tuning of the photon energy. Synchrotron radiation and high-resolution monochromators allow continuous tuning, but with a resolution of the order of 50-100 meV. Undulators on storage rings should improve this to perhaps 10 meV. Free electron lasers offer an improvement in resolution which is needed to address certain important problems in condensed matter physics.

© 1988 Optical Society of America