Yj. Xu et al., DIRECT MEASUREMENT OF POPULATION-INDUCED BROADENING OF QUANTUM-WELL INTERSUBBAND TRANSITIONS, Applied physics letters, 71(6), 1997, pp. 838-840
The dependence of the absorption spectral linewidth of quantum well in
tersubband transitions on the electron population in the well is exper
imentally demonstrated. We show that the dependence of the spectral li
newidth on the population is substantial and accounts for some of the
broadening previously attributed to donor scattering. (C) 1997 America
n Institute of Physics.