Strong confinement regime

The strong-confinement regime corresponds to the opposite limit, d < 2<2q. In that case the relative electron-hole motion is strongly affected by the barriers. In the direction of restricted motion, the kinetic energies of the lowest-energy electron and hole states determined by the quantum confinement are larger than the Coulomb... 

In the strong confinement regime, the spectrum is reduced to a series of wide bands corresponding to the transitions between electron and hole levels. 

Many groups have already observed the asymmetrical broadening in Raman experiments on Il-VI-semiconductor dots (see, for example. Refs. 152 and 154), but the observed amount of the redshift lies below the expected one. This can be caused by different effects. The most important one is that the investigated dots are not small enough The dot radius should be smaller than the exciton Bohr radius of the respective semiconductor material to obtain measurable shifts (strong confinement regime). Furthermore, matrices. 

---