Abstract
We discuss a number of experiments involving optical spectroscopy of excitons localized by interface fluctuations in narrow GaAs quantum wells. Monolayer-high steps at the interface lead to lateral confinement that in some cases can be described by a quantum dot (Qdot) potential. We focus on Qdots that are 3 - 5 nm thick, as determined by the quantum well thickness, and an order of magnitude larger in the lateral dimensions, as determined by the sizes of the monolayer-high islands at the interfaces [1].
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