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Coherent control of exciton–biexciton beats: direction selectivity of four‐wave‐mixing signals in experiment and microscopic theory
Author(s) -
Voss Tobias,
Rückmann Ilja,
Gutowski Jürgen,
Axt Vollrath Martin,
Kuhn Tilmann
Publication year - 2006
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.200668068
Subject(s) - beat (acoustics) , biexciton , amplitude , quantum beats , physics , mixing (physics) , exciton , four wave mixing , coherent control , photon , atomic physics , quantum mechanics , quantum , optics , laser , nonlinear optics
In experiments and simulations based on a microscopic theory the optical coherent control of exciton–biexciton beats in coherent four‐wave‐mixing signals from a semiconductor quantum well is demonstrated. It is found that a reduction of the beat amplitude for one four‐wave‐mixing direction may at the same time coincide with a large beat amplitude for the other direction. The results can be understood by considering that at least two‐photon processes are required to coherently excite biexcitonic transitions which are responsible for the occurrence of the beat structure in the four‐wave‐mixing signals. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)