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 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.
Luo
C W
CW
Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, 12489 Berlin, Germany.
Reimann
K
K
Woerner
M
M
Elsaesser
T
T
Hey
R
R
Ploog
K H
KH