Abstract

The CdTe quantum dots (QDs) grown on a ZnTe epilayer deposited directly on a GaSb substrate are studied by transmission electron microscopy (TEM) and near-field scanning optical microscopy. High resolution TEM images show CdTe QD of planoconvex shape. Near-field photoluminescence (NPL) in an applied magnetic field is used to measure the Zeeman splitting and diamagnetic shift of single CdTe QDs. Finally, time resolved NPL measurements suggest that the higher energy lines in the CdTe QD NPL spectra correspond to exciton transitions occurring in larger CdTe QDs and have shorter exciton lifetimes.

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