LEVEL BROADENING EFFECTS IN HOT LUMINESCENCE FROM A QUANTUM-WIRE

We consider hot luminescence from a quantum wire (QWR) due to electron s that are excited by a narrow band, noncoherent cw laser, to the clos e vicinity of the threshold for optical LO phonon emission. In this ca se one has to resort to quantum kinetic equations (QKEs), since the le vel broadening close to the threshold is large, due to the singular 1D density of states. The QKEs are formulated using a recipe that we der ived for the generalization of the Boltzmann equation (BE). The lumine scence spectral distribution is calculated using these QKEs. It is sho wn that the scale that determines the quantum behavior of the system d iffers from what one would expect from simple level broadening conside rations.