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The Biexciton Levels and Nonlinear Optical Transitions in ZnO
Author(s) -
Hvam J. M.,
Blattner G.,
Reuscher M.,
Klingshirn C.
Publication year - 1983
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.2221180122
Subject(s) - biexciton , exciton , raman scattering , raman spectroscopy , excitation , atomic physics , polariton , resonance (particle physics) , scattering , luminescence , resonance raman spectroscopy , spectroscopy , molecular physics , physics , condensed matter physics , chemistry , optics , quantum mechanics
The controversy about the level scheme of the biexcitons in ZnO is solved by two‐photon reabsorption spectroscopy. Three levels are detected, corresponding to the possible combinations of A and B valence band holes. The diamagnetic shift of these states is below 2 × 10 −6 eV T −2 in agreement with the small exciton and biexciton radii. In forward two‐photon Raman scattering, two excitation induced renormalizations of the polariton dispersion are observed, partly involving transitions to the biexciton level. The M‐band luminescence and the resonance structure observed in backward two‐photon Raman scattering are reconsidered in terms of the new level scheme.