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.
Banfi, F., Giannetti, C., Ferrini, G., Galimberti, G., Pagliara, S., Fausti, D., Parmigiani, F., Experimental evidence of above-threshold photoemission in solids, <<PHYSICAL REVIEW LETTERS>>, 2005; 94 (3): N/A-N/A. [doi:10.1103/PhysRevLett.94.037601] [http://hdl.handle.net/10807/9190]
Experimental evidence of above-threshold photoemission in solids
Banfi, Francesco;Giannetti, Claudio;Ferrini, Gabriele;Galimberti, Gianluca;Pagliara, Stefania;Fausti, Daniele;Parmigiani, Fulvio
2005
Abstract
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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