Abstract

Picosecond time- and angle-resolved photoemission spectroscopy is a newly developed technique for studying dynamical processes at surfaces. The basic concept is to make use of the power of angle-resolved photoemission to analyze both the energy as well as momentum dynamics of electrons in bulk crystals as well as on crystal surfaces that have first been photoexcited to normally empty states lying above the Fermi-level. Using this technique, bulk and surface conduction band electrons have been studied on InP^1,2, GaAs Schottky barriers³, and Si⁴ surfaces. These initial studies demonstrate the power and versatility of the technique, and point toward a wide array of investigations into surface dynamics.

© 1988 Optical Society of America