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Signatures of biexcitons and triexcitons in coherent non‐degenerate semiconductor optics
Author(s) -
Meier T.,
Sieh C.,
Finger E.,
Stolz W.,
Rühle W. W.,
Thomas P.,
Koch S. W.,
Wieck A. D.
Publication year - 2003
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200303183
Subject(s) - biexciton , exciton , degenerate energy levels , semiconductor , spectroscopy , excitation , physics , absorption (acoustics) , condensed matter physics , molecular physics , atomic physics , optoelectronics , quantum mechanics , optics
Signatures of exciton and two‐exciton states in semiconductor systems are investigated experimentally and theoretically. A set of quantum well samples with different well widths is studied using coherent excitation spectroscopy. The experimental results are analyzed using a microscopic model demonstrating the importance of biexciton correlations and disorder effects. Additional numerical investigations of absorption changes in small nanorings are employed to analyze optical transitions from two‐exciton to three‐exciton resonances.