Abstract
A microscopic theory is presented which is capable of describing the influence of biexciton many-body correlations on the nonlinear optical response of the Si(111)-(2×1) surface exciton. The band structure and the quasiparticle wave functions of this surface are obtained by ab initio many-body perturbation theory within the GW method. These results are used as a basis for setting up semiconductor Bloch equations. Analyzing the optical response including many-body correlations in the coherent χ(3) limit, it is shown that for resonant and near-resonant excitation of the surface exciton, the correlations contribute significantly to the optical response. The binding energy of the surface biexciton is predicted to be about 18meV.
| Original language | English (US) |
|---|---|
| Article number | 235324 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 71 |
| Issue number | 23 |
| DOIs | |
| State | Published - Jun 15 2005 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
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Oszwałdowski, R., Reichelt, M., Meier, T., Koch, S. W., & Rohlfing, M. (2005). Nonlinear optical response of the Si(111)-(2×1) surface exciton: Influence of biexciton many-body correlations. Physical Review B - Condensed Matter and Materials Physics, 71(23), [235324]. https://doi.org/10.1103/PhysRevB.71.235324