Laser-induced desorption from the (111) surface of BaF2

We have investigated the wavelength, polarization, and intensity dependence of the electron and ion emission from the (111) surface of BaF2 under irradiation with pulsed tunable laser light in the green and blue spectral ranges. We also carried out cluster calculations to obtain a prediction for the electronic surface structure of BaF2 (111). Based on these results, a qualitative model for the desorption of positive ions from this surface is proposed.