Temperature dependence of exciton linewidths in InSb quantum wells - art. no. 115321

We studied the linewidths of excitons in InSb/Al0.09In0.91Sb quantum wells between 4.2 and 300 K using Fourier-transform infrared spectroscopy. Even t hough the exciton binding energy is only about 1 meV, the absorption is exc itonic up to room temperature, due to very weak LO-phonon-electron coupling . The electron-phonon coupling constants and exciton binding energies were obtained through fitting the experimental data. We found that acoustic phon on scattering must be taken into account in fitting the experimental excito n linewidths.