Experimental evidence of above-threshold photoemission in solids

Details Experimental evidence of above-threshold photoemission in solids Experimental evidence of above-threshold photoemission in solids

2012-01-14

arxiv.org/abs/1201.3049v1

Phys. Rev. Lett. 94, 37601 (2005)

Physics

Condensed Matter

Materials Science

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.94.037601

Nonlinear photoemission from a silver single crystal is investigated by femtosecond laser pulses in a perturbative regime. A clear observation of above-threshold photoemission in solids is reported for the first time. The ratio between the three-photon above-threshold and the two-photon Fermi edges is found to be 10^{-4}. This value constitutes the only available benchmark for theories aimed at understanding the mechanism responsible for above-threshold photoemission in solids.

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