MANY-BODY EFFECTS IN THE LUMINESCENCE OF IN0.53GA0.47AS INP QUANTUM WIRES/

We have investigated many body effects in the one-dimensional neutral electron-hole plasma of In0.53Ga0.47 As/InP quantum wires. By using hi gh laser excitation the active section of the wires was filled up to t he InP barrier. The luminescence band shows up to four features which can be assigned to lateral subband transitions in the quantum wires. W ith increasing excitation intensities we observe a red shift of the em ission due to the interparticle interaction among the carriers. By usi ng theoretical line shape calculations the temperature and the density for the electron-hole plasma and the band gap renormalization were de termined. The decreasing band gap renormalization with increasing subb and index was traced to the density dependence of the exchange energy.