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 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Nonlinear optical response of the Si(111)-(2×1) surface exciton : Influence of biexciton many-body correlations. / Oszwałdowski, R.; Reichelt, M.; Meier, T.; Koch, Stephan W; Rohlfing, Michael.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 71, No. 23, 235324, 15.06.2005.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nonlinear optical response of the Si(111)-(2×1) surface exciton
T2 - Influence of biexciton many-body correlations
AU - Oszwałdowski, R.
AU - Reichelt, M.
AU - Meier, T.
AU - Koch, Stephan W
AU - Rohlfing, Michael
PY - 2005/6/15
Y1 - 2005/6/15
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevB.71.235324
DO - 10.1103/PhysRevB.71.235324
M3 - Article
AN - SCOPUS:28344451881
VL - 71
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 23
M1 - 235324
ER -