Abstract
Micro‐photoluminescence spectroscopy for varying temperature, excitation intensity and energy was performed on a single InAs/AlAs self‐assembled quantum dot. A broad sideband at 1.2 meV of the zero phonon line is attributed to the exciton‐acoustic phonon interaction via deformation potential coupling. The piezoelectric coupling of the exciton to long‐wavelength phonons is also observed and gives rise to a narrow low‐energy sideband at about 0.25 meV of the zero‐phonon line. This band strengthens with decreasing density of photocreated free carriers, since they screen out the piezoelectric coupling mechanism.
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