Seminars Archive

Sub-picosecond non-linear photoemission from solid surfaces

Abstract
Non-linear photoelectric emission from Cu and W is investigated by sub-picosecond laser pulses. Using a pump and probe technique, total yield correlation measurements free from space charge saturation are obtained. The effects of heating of the conduction electrons are shown. The analysis presented clarifies the consequences of a transient non-equilibrium temperature differences between electrons and the lattice on the correlation trace, confirming for W the presence of a thermally assisted photoemission mechanism.