Mechanism of Laser-induced Field Emission

Abstract

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.

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

References in corpus (5)

• A Femtosecond Nanometer Free Electron Source
• A spatially and temporally localized sub-laser-cycle electron source
• Strong-field above-threshold photoemission from sharp metal tips
• Laser-induced ultrafast electron emission from a field emission tip
• Laser-induced Field Emission from Tungsten Tip: Optical Control of Emission Sites and Emission Process

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