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Experimental coupling strengths between excitons and LO phonons (full circles) plotted against the experimental (a) and calculated (b) exciton binding energies in bulk ZnO and quantum wells. Also shown by a solid line is the calculated curve for based on Eqs. (2) and (3). The well widths are marked next to the symbols in the upper frame. An open circle and results on calculated binding energies are cited from Refs. 13 and 14, respectively.
Schematic illustration of the scattering process contributing to the phonon-induced broadening of the exciton linewidth. The solid lines indicate the Rydberg series of exciton states, while the dashed line area depicts continuum states.
The material parameters of ZnO used in calculating the LO-phonon interaction to the linewidth, taken from the Landolt–Börnstein table.
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