Strong-Field Above-Threshold Photoemission from Sharp Metal Tips

Schenk M, Krüger M, Hommelhoff P (2010)

Publication Language: English

Publication Type: Journal article, Letter

Publication year: 2010


Book Volume: 105

Article Number: 257601


DOI: 10.1103/PhysRevLett.105.257601


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 ∼2×1011  W/cm2 the 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 −1.0  eV/(1012  W/cm2). We attribute the magnitude of the laser field effects to field enhancement taking place at the tip’s surface.

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Schenk, M., Krüger, M., & Hommelhoff, P. (2010). Strong-Field Above-Threshold Photoemission from Sharp Metal Tips. Physical Review Letters, 105.


Schenk, Markus, Michael Krüger, and Peter Hommelhoff. "Strong-Field Above-Threshold Photoemission from Sharp Metal Tips." Physical Review Letters 105 (2010).

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