Strong-field above-threshold photoemission from sharp metal tips
Quantum Physics
2010-12-30 v1 Mesoscale and Nanoscale Physics
Atomic Physics
Abstract
We present energy-resolved measurements of electron emission from sharp metal tips driven with low energy pulses from a few-cycle laser oscillator. We observe above-threshold photoemission with a photon order of up to 9. At a laser intensity of 2*10^11 W/cm^2 suppression of the lowest order peak occurs, indicating the onset of strong-field effects. We also observe peak shifting linearly with intensity with a slope of around -1.8eV / (10^12 W/cm^2). We attribute the magnitude of the laser field effects to field enhancement taking place at the tip's surface.
Cite
@article{arxiv.1009.2872,
title = {Strong-field above-threshold photoemission from sharp metal tips},
author = {Markus Schenk and Michael Krüger and Peter Hommelhoff},
journal= {arXiv preprint arXiv:1009.2872},
year = {2010}
}
Comments
5 pages, 3 figures