Abstract
We present results on the acoustical phonon dephasing for a single GaAs quantum dot. Micro photoluminescence (μ-PL) is used to observe the temperature dependence of the exciton line in self-assembled GaAs semiconductor single quantum dots (QDs). The observation of the PL with temperature shows that there are two different states within the PL emission, namely the zero-phonon line and the phonon sidebands. When the temperature increases, the effect of the sidebands become clearer and show substantial broadening. In the present experiments, PL and μ-PL spectra have been measured at temperatures of 5K≤T≤90K for GaAs self-assembled QD samples.
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