This project proposes a sequence of tasks related to the systematic investigation of the optical response and electronic properties of semiconductor quantum dots of different geometries and compositions that offer interesting possibilities for manipulation of the electronic structure and the study of new quantum phenomena. This contribution is part of a collaboration between experimental growth and spectroscopy groups and theoretical coworkers that treat problems related to the manipulation of spin states in quasi-zero dimensional systems with cylindrical symmetry and ring shape (quantum rings). Such a project would contribute to the support for the nucleation of these lines of research. Our goals cover the theoretical and experimental study of semi-magnetic quantum dots (grown on the basis of CdMnSe) and non-magnetic (grown on the basis of GaInAs), with new structural properties with which one may control separately the effects of conduction and valence bands. Thus, two basic lines of work will be addressed here: i) Simultaneous measurement and characterization of spin-dependent optical phenomena in these samples, ii) the theoretical simulation of optical effects and transport properties related to the spin of carriers in these systems with confined states. The elucidation of anomalous magnetic effects detected experimentally under certain growth conditions and thermal treatment of the samples will determine the theoretical commitments described herein.
News published in Agência FAPESP Newsletter about the scholarship: