SECOND HARMONIC GENERATION AT CRYSTALLINE SEMICONDUCTOR SURFACES
Bernardo Mendoza (Thesis Adviser)
Summary or description
"First, we obtain linear and non-linear optical spectra of clean Si(100) 2x1 reconstructed surfaces based on the model of polarizable bonds. The crystal is is modeled as an array of point-like polarizable dipoles where each dipole is considered to be at the middle of every Si-Si bond. The model incorporates the reconstruction of the surface through the local field effect. We calculate the optical spectra as a function of dimer buckling and it is shown that the structure which nicely reproduce the experimental reflectance anisotropy and second harmonic generation (SHG) spectra for the c(4 X 2) Si(100) surface. On the other hand, we apply a microscopic formalism to calculate the different contribution to the nonlinear second-order susceptibility required in the calculation of SHG."
Arzate Plata, (2000). "Second Harmonic Generation at Crystalline Semiconductor Surfaces". Tesis de Doctorado en Ciencias (Óptica). Centro de Investigaciones en Óptica, A.C. León, Guanajuato. 132 pp.
REPOSITORIO INSTITUCIONAL DEL CIO