Semiconductor quantum well excitons in strong, narrowband terahertz fields

Diamagnetic Shifts of Quantum Well Excitons in Strong Magnetic Fields Applied in the Well Planes

Quantum Well Excitons in Semiconductor Microcavities: Uniied Treatment of Weak and Strong Coupling Regimes

The system of one or several quantum wells embedded in a pla-nar semiconductor Fabry-P erot microcavity with distributed Bragg reeectors is studied in the framework of both a semiclassical and a full quantum theory. The results obtained with the two treatments are proved to be equivalent. Simple analytical expressions for the exciton-radiation mixed mode energies are obtained. In particular the...

Theory of Quantum Well Excitons in Electric and Magnetic Fields

The effects of external electric and magnetic fields on excitons in GaAsIAlGaAs quantum wells have been calculated in the effective mass approximation. Recent experiments by Viiia et al. which identify exciton couplings induced by an electric field are satisfactorily explained by the effects of valence band mixing. The properties of magneto-excitons in quantum wells are also found to be charact...

Electron-spin beat susceptibility of excitons in semiconductor quantum wells.

Recent time-resolved differential transmission and Faraday rotation measurements of long-lived electron-spin coherence in quantum wells displayed intriguing parametric dependencies. For their understanding we formulate a microscopic theory of the optical response of a gas of optically incoherent excitons whose constituent electrons retain spin coherence, under a weak magnetic field applied in t...

Fine structure of highly charged excitons in semiconductor quantum dots.

An exciton in a symmetric semiconductor quantum dot has two possible states, one dark and one bright, split in energy by the electron-hole exchange interaction. We demonstrate that for a doubly charged exciton, there are also two states split by the electron-hole exchange, but both states are now bright. We also uncover a fine structure in the emission from the triply charged exciton. By measur...