PERIODIC-STRUCTURE EFFECTS ON MULTIPHOTON ELECTRON EJECTION FROM A METAL-SURFACE

The multiphoton photoelectric effect on a metal surface is studied wit h the Kronig-Penney model used to account for effects that are due to the band structure of the conduction electrons and for the possibility of photon absorption during laser penetration of the metal bulk. The numerical results show that the ionization process depends only weakly on the laser penetration length considered. The energy distribution o f the ejected electrons is found not to be a fast-decreasing function of the energy and in this sense is akin to the observed distribution.