Two-photon photoemission from Ni (1 1 0) and (1 1 1) surfaces |
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Authors: | HW Rudolf D Rieger W Steinmann |
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Institution: | Sektion Physik der Universität München, Schellingstraβe 4, 8000 München 40, Germany |
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Abstract: | Photoemission was observed when the samples were irradiated with photons in the energy range from 2.5 to 3.3 eV from a tunable dye laser with an intensity of 108Wcm?2. The emission shows a quadratic intensity dependence. The variation with angle of incidence and polarization is different for the two surfaces. The result obtained from the (1 1 0) surface is discussed with help of the band structure as a two-photon surface photoelectric effect. |
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