Abstract
Publisher Summary This chapter reviews the most recent experimental and theoretical work about the optical properties of excitons in ZnSe-based quantum wells. It briefly summarizes the basic theoretical concepts used to model quasi-two-dimensional excitons in quantum wells. The chapter discusses the linear optical properties of excitons, including the electrostatic and thermal stability, the strength of the quantum size effect in quantum wells and thin films, the phototransport properties, and the temporal evolution of the excitonic transitions. The nonlinear optical properties of excitons are considered. The chapter discusses the interaction of excitons with a single-carrier and a two-carrier plasma and the role of excitons in the lasing processes of II-VI quantum wells. The role of excitons in the operation of optoelectronic devices operating in the blue-green region has been emphasized in the discussion of the nonlinear optical properties. The unique combination of large exciton binding energy and reduced screening and phonon coupling occurring in quantum wells permits the observation of novel phenomena connected with the coexistence of the exciton gas and the free-carrier gas at high density.
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