Abstract
The purpose of the present set of lectures is to introduce students to the field of the optical properties of quantum wells (and superlattices ?). As this field has grown out of proportions so as to be covered in three lectures, we have choosen to focus on three areas of the subject which seem to us more appropriate to the aims of the school, namely: (i) The specific aspects of 20 systems concerning optical properties. (ii) A description of the techniques of optical spectroscopy so widely used in 3D systems, and their relative qualities when applied to the field of quantum wells. (iii) The specific design rules and properties of quantum-well lasers (QWLs). As will be seen below, they are quite dominated by “subtle” 2D effects, and QWLs therefore represent a good laboratory to study what are the pros and cons of 2D devices. The discussion of the difficulties encountered with 2D QWLs will then be briefly extended to ID and OD devices.
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