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Ultrafast nonlinear optical response of Fano resonances in GaAs under high magnetic field
Author(s) -
Siegner U.,
Mycek M.A.,
Glutsch S.,
Chemla D. S.
Publication year - 1995
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.2221880133
Subject(s) - dephasing , fano resonance , physics , coulomb , femtosecond , fano plane , four wave mixing , ultrashort pulse , exciton , condensed matter physics , coupling (piping) , atomic physics , nonlinear system , quantum mechanics , nonlinear optics , plasmon , laser , materials science , mathematics , pure mathematics , metallurgy , electron
The coherent dynamics of Fano resonances in GaAs are studied under magnetic field using femtosecond four‐wave mixing (FWM). In this system Coulomb coupling bel ween magnetoexciton and continuum states gives rise to Fano interference. By time‐resolving the FWM signal it is shown that dephasing of the coherent emission from a Fano resonance is dominated by the coupling to the continuum. Unlike Lorentzian resonances, the decay of the time‐integrated FWM signal is not related to dephasing. This surprising behavior is due to the interplay between Fano interference and Coulomb correlation in a semiconductor.