Free-induction decay in quantum wires

Using the time-dependent perturbation treatment, we report the occurrence o f first-order free-induction decay in GaAs/GaAlAs quantum wire structures. The results of the theoretical investigation reveal oscillations in the dec ay profile of the polarization. The transient transmitted intensity has bee n found to decay in a time comparable to the inhomogeneous broadening time, which is much shorter than the dephasing time. We have also studied the tr ansmitted intensity as a function of wire width and found the results to be in good qualitative agreement with that available in the literature. (C) 1 999 Academic Press.