Optical and transport experiments in nano-structures with semiconductor superlattices

I presented the recent results on the RRS, PLE, and PL in ordered and intentionally disordered semiconductor SL’s in the presence of an external magnetic field. From the RRS and PLE spectra, we calculated and compared the behaviours of the energy dispersions of the dephasing times, relating them to the ordered and disordered nature of the SL’s. We also studied the behaviour of the emission energy and linewidth with the magnetic field, comparing the results with the available results obtained on QW systems. As regards the dependence of the PL linewidth on the field, we found distinct difference in the evolution of the PL width between the ordered and disordered SL’s. While in the ordered SL the PL linewidth increases monotonously with the field, in the disordered SL the evolution is not monotonous and this behaviour can be correlated to the interplay between localization length and exciton extension in the z direction along which the intentional disorder is present.