Phase-resolved nonlinear response of a two-dimensional electron gas under femtosecond intersubband excitation

Strong electric-field transients resonant to intersubband transitions in n-type modulation-doped GaAs/AlGaAs quantum wells induce coherent Rabi oscillations, which are demonstrated by a phase-resolved measurement of the light emitted by the sample. The time evolution of the intersubband polarization...

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Veröffentlicht in:Physical review letters 2004-01, Vol.92 (4), p.047402-047402, Article 047402
Hauptverfasser: Luo, C W, Reimann, K, Woerner, M, Elsaesser, T, Hey, R, Ploog, K H
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Sprache:eng
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Zusammenfassung:Strong electric-field transients resonant to intersubband transitions in n-type modulation-doped GaAs/AlGaAs quantum wells induce coherent Rabi oscillations, which are demonstrated by a phase-resolved measurement of the light emitted by the sample. The time evolution of the intersubband polarization is influenced by Coulomb-mediated many-body effects. The subpicosecond period and the phase of the Rabi oscillations are controlled by the properties of the midinfrared driving pulse.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.92.047402