Picosecond time-resolved photoemission study of the InP(110) surface.

Angle-resolved ultraviolet photoemission spectroscopy (ARUPS) is a powerful and well established tool for the study of bulk and surface electron states in solids. We report the first demonstration of picosecond time-resolved ARUPS. The technique was used to study the dynamics of electrons photoexcited by a 50 picosecond visible laser pulse on a cleaved InP (110) surface.