Transient lensing from a photoemitted electron gas imaged by ultrafast electron microscopy
Transient lensing from a photoemitted electron gas imaged by ultrafast electron microscopy
Abstract Understanding and controlling ultrafast charge carrier dynamics is of fundamental importance in diverse fields of (quantum) science and technology. Here, we create a three-dimensional hot electron gas through two-photon photoemission from a copper surface in vacuum. We employ an ultrafast electron microscope to record movies of the subsequent electron …