Electron-polariton scattering in semiconductor microcavities.

TL;DR: In this article, it was shown that photons in certain materials can form massive, strongly interacting quasiparticles, giving rise to nonlinear effects that could be useful in quantum optics.

Abstract: The Bose–Einstein condensate of exciton-polaritons has emerged as a unique, coherent system for the study of non-equilibrium, macroscopically coherent Bose gases, while the full confinement of this coherent state to a semiconductor chip has also generated considerable interest in developing novel applications employing the polariton condensate, possibly even at room temperature. Such devices include low-threshold lasers, precision inertial sensors, and circuits based on superfluidity with ultra-fast non-linear elements. While the demonstration and development of such devices are at an early stage, rapid progress is being made. In this review, an overview of the exciton-polariton condensate system and the established and emerging material systems and fabrication techniques are presented, followed by a critical, in-depth assessment of the ability of the coherent polariton system to deliver on its promise of devices offering either new functionality and/or room-temperature operation.

TL;DR: In this paper, the authors review time-resolved observations of the polariton interactions in a number of different geometries including pumping at either the magic angle, or the bottom of a polariton trap.

TL;DR: In this article, a two-pulse excitation technique was used to induce the ultrafast and controlled quenching of the exciton emission in a quantum well, where the depth of the dip is given by the magnitude of the warming of the carriers induced by the arrival of a laser pulse when an exciton population is already present in the sample.

TL;DR: This work experimentally demonstrates resonant coupling between photons and excitons in microcavities which can efficiently generate enormous single-pass optical gains approaching 100 and utilizes boson amplification induced by stimulated energy relaxation.

TL;DR: The physics of strong coupling phenomena in semiconductor quantum microcavities is reviewed in this paper, with most important developments having occurred in the last 5 years, and the results of reflectivity experiments at both normal and oblique angles of incidence, the effects of external electric and magnetic fields, and results of coherent Raman scattering experiments, including the observation of motional narrowing over the exciton disorder potential.

TL;DR: In this paper, the experimental and theoretical aspects of the optical properties of direct-gap semiconductors under strong optical excitation are discussed, and the optical spectra of dense excitonic systems, which are mainly observed in copper halides and II-VI compounds, are shown to be determined mainly by the interaction processes between excitionic molecules, polaritons and free carriers.

TL;DR: In this article, the polariton dynamics in a semiconductor microcavity for small temperatures and zero exciton-Cavity detuning were studied, including the excitonexciton and excitonphonon scatterings.