Mechanism of Laser-induced Field Emission
  We have measured electron energy distribution curves (EDCs) of the laser-induced field emission from a tungsten tip. Field emission from photo-excited nonequilibrium electron distributions were clearly observed, while no enhanced field emission due to optical electric fields appeared up to values of 1.3 V/nm. Thus, we experimentally confirm the emission mechanism. Simulated transient EDCs show that electron dynamics plays a significant role in the laser-induced field emission. The results should be useful to find optimal parameters for defining the temporal and spectral characteristics of electron pulses for many applications based on pulsed field emission. 
Hirofumi Yanagisawa, Matthias Hengsberger, Dominik Leuenberger, Martin   Kl\"ockner, Christian Hafner, Thomas Greber and J\"...
cond-mat.mes-hall