Mechanism of Laser-induced Field Emission

Details Mechanism of Laser-induced Field Emission Mechanism of Laser-induced Field Emission

2011-03-22

arxiv.org/abs/1103.4310v1

Phys. Rev. Lett. 107, 087601 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages 4 figures 1 table, submitted to Physical Review Letters

Scientific paper

10.1103/PhysRevLett.107.087601

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.

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