Abstract:

Based on an analytical expression for the photoluminescence (PL) intensity of individual quantum dots (QDs) in the linear regime, we investigate its dependence upon the size of self‐assembled InGaAs QDs. We prove that decreasing the QD size, the PL‐emission spectrum moves to higher energy, due to the confinement‐induced blue‐shift of the electronic levels and the redshift from the increased Coulomb interaction caused by the compression of the exciton radii. This shift is in agreement with experimental results. Moreover, we show that larger dots provide more intense PL spectra.

Notes:

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