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The exciton binding energy in GaAs-based quantum-well (QW) structures is in the range of ~10 meV, which falls in the terahertz (THz) regime. THz-induced nonlinear optical effects of excitons in QWs are of great interest because they provide new insights into the quantum coherence and wavepacket dynamics in semiconductors. This paper presents a time-resolved study to observe resonant interactions of...
Summary form only given. When a quantum-well exciton transition is resonant with a single mode of a high-Q microcavity, the normal modes ("cavity polaritons") of the coupled system are equal admixtures of the exciton and cavity. We have previously shown that, if the lower normal mode is excited by a phase-locked pair of optical pulses, the nonlinear response of a probe pulse tuned to the...
Summary form only given. Extensive recent studies have provided valuable understanding on the role of correlations between excitons in optical interactions in semiconductors. Few experimental and theoretical studies, however, have addressed the effects of correlations when a semiconductor is excited above the band gap. In this paper, we report studies of 4-particle correlations by using differential...
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