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Nondegenerate Coherent Control of Polariton Modes in a Quantum‐Well Semiconductor Microcavity
Author(s) -
Lee Y.S.,
Norris T.B.,
Prineas J.,
Khitrova G.,
Gibbs H.M.
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<121::aid-pssb121>3.0.co;2-l
Subject(s) - dephasing , polariton , coherent control , excitation , physics , exciton , quantum well , semiconductor , condensed matter physics , optics , optoelectronics , quantum , quantum mechanics , laser
We demonstrate nondegenerate coherent control of the cavity‐polariton modes of a quantum‐well semiconductor microcavity. Coherent excitation and de‐excitation of one normal mode using a pair of phase‐locked optical pulses gives rise to a nonlinear response on the other normal mode due to the nonlinearity of the exciton transition underlying the normal modes. The cavity enhancement of the excitonic nonlinearity gives rise to a large signal; modulating the relative phase of the excitation pulses between zero and π produces a differential reflectivity (Δ R / R ) of up to 15%. Coherent control is used to measure the polariton dephasing time as a function of density. Excitation induced dephasing is shown to be the factor limiting the degree of coherent control.