Field emission tip as a nanometer source of free electron femtosecond pulses

被引：375

作者：

Hommelhoff, P ^{[1
]}

Sortais, Y ^{[1
]}

Aghajani-Talesh, A ^{[1
]}

Kasevich, MA ^{[1
]}

机构：

[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.96.077401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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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页码：1 / 4

页数：4

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