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VOLUME 66 (1997) | ISSUE 6 | PAGE 379
Effect of nonlinear wave mixing on ultrafast modulation of interband light in semiconductor quantum wells
We investigate the effect of an induced sum-frequency signal on the transient modulation of interband-resonant probe light by a train of intersubband-resonant coupling light pulses in undoped quantum wells. The origin of the generated sum-frequency signal lies in the asymmetry of the three-level quantum well structure. The modulation characteristics are found to be significantly affected in the presence of a strong sum-frequency signal that builds up proportionately to the input probe field. PACS: 42.65.-k, 78.20.Ci, 78.66.-w,