A Femtosecond Nanometer Free Electron Source

Details A Femtosecond Nanometer Free Electron Source A Femtosecond Nanometer Free Electron Source

2005-07-26

arxiv.org/abs/quant-ph/0507241v1

Phys. Rev. Lett. 96, 077401 (2006)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.96.077401

We report a source of free electron pulses based on a field emission tip irradiated by a low-power femtosecond laser. The electron pulses are shorter than 70 fs and originate from a tip with an emission area diameter down to 2 nm. Depending on the operating regime we observe either photofield emission or optical field emission with up to 200 electrons per pulse at a repetition rate of 1 GHz. This pulsed electron emitter, triggered by a femtosecond oscillator, could serve as an efficient source for time-resolved electron interferometry, for time-resolved nanometric imaging and for synchrotrons.

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