Optical Second Harmonic Generation in Semiconductor Nanostructures
Figure 6
Comparison of calculated and measured SHG spectra for -in/-out configuration. (a) Clean Si(001) , theory (solid curve) and experiment(open circles); Si(001) : H monohydride, theory (dashed curve) and experiment (filled circles). Note strong quenching, red-shifting, and line shape distortion of 3.35 eV () peak in both theory and experiment, (b) Clean Si(001) , theory (solid curve) and experiment (open circles) as in (a), Si(001) : Ge(1 ML), theory (dot-dashed curve) and experiment (diamonds); Si(001) : Ge(2 ML), theory (heavy dotted curve: fully relaxed structure; light dotted curve: reduced buckling structure) and experiment (open squares); Si(001) : Ge(2 ML) with saturation H-coverage, theory (dashed curve) and experiment (filled squares) (adapted from [28]).
