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Radiative Coupling in Single Quantum Wells and Bragg Structures
Author(s) -
Ammerlahn D.,
Kuhl J.,
Grote B.,
Koch S.W.,
Khitrova G.,
Gibbs H.,
Hey R.,
Ploog K.H.
Publication year - 2000
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 - 10.1002/1521-3951(200009)221:1<101::aid-pssb101>3.0.co;2-t
Subject(s) - dephasing , superradiance , exciton , quantum well , excited state , physics , cladding (metalworking) , condensed matter physics , radiative transfer , biexciton , atomic physics , chemistry , optics , laser
Time‐integrated four‐wave mixing experiments reveal strong influence of the cladding layer thickness d 1 , its refractive index and the reflectivity of the sample–air interface on the radiative dephasing time T rad of excitons in single quantum wells and multiple quantum well structures. A cladding layer thickness of λ /2 and λ /4 decreases and increases, respectively, T rad . Furthermore, we show that the superradiance is not limited to the heavy‐hole exciton but can be observed even on excited and light‐hole–exciton states as well as on correlated electron–hole‐pair states. All findings agree fairly well with solutions of the semiconductor Maxwell‐Bloch equations.