Physics – Condensed Matter – Materials Science
Scientific paper
2007-03-26
Physics
Condensed Matter
Materials Science
Scientific paper
The near-field scanning optical microscopy images of excitonic wavefunctions in self-assembled InAs/GaAs quantum dots are calculated using an empirical pseudopotential method, followed by the configuration interaction (CI) treatment of many-particle effects. We show the wavefunctions of neutral exciton $X^0$ of different polarizations, and compare them to those of the biexciton $XX$ and the charged excitons $X^+$ and $X^-$. We further show that the exciton $X(P_h \to S_e)$ transition which is forbidden in the far-field photoluminescence has comparable intensities to that of $X(S_h \to S_e)$ transition in the near-field photoluminescence .
Bester Gabriel
He Lixin
Su Zhiqiang
Zunger Alex
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