POLARIZATION-DEPENDENT SURFACE TRANSITIONS AT SB/GAAS(110)

We have investigated, both experimentally and theoretically, the optical properties of an epitaxial monolayer of Sb deposited on GaAs(110). In particular we have studied the polarization-dependence of Differential Reflectance. Good agreement between the experimental results and theory has been found. Several spectral features observed in the visible energy range have been interpreted, on the basis of the theoretical results, as optical transitions taking place at different symmetry points of the surface Brillouin zone.