F.J. Himpsel, T.A. Jung, et al.
Surface Review and Letters
Because of their long lifetime in coupled quantum wells under an applied electric field, excitons may he able to reach thermodynamic quasi-equilibrium. Here we measure photoluminescencc and photoluminescence excitation spectra from a symmetric coupled double quantum well. Analysis of the spectra shows that thermodynamic quasi-equilibrium is not achieved at temperatures below 6 K, where the excitons are trapped in a metastahle distribution. At higher temperatures, quasi-equilihrium is achieved. Because of strong repulsion between the excitons, the quasi-equilihrium distribution can he modeled with a Fermi-Dirac distribution. The model quantitatively explains the striking temperature dependence of the photoluminescence lincwidth which has been previously reported. © 1992.
F.J. Himpsel, T.A. Jung, et al.
Surface Review and Letters
K.N. Tu
Materials Science and Engineering: A
H.D. Dulman, R.H. Pantell, et al.
Physical Review B
J. Paraszczak, J.M. Shaw, et al.
Micro and Nano Engineering