Single-electron charging of a self-assembled II–VI quantum dot

Seufert, J.; Rambach, M.; Bacher, G.; Forchel, A.; Passow, T.; Hommel, D.
June 2003
Applied Physics Letters;6/2/2003, Vol. 82 Issue 22, p3946
Academic Journal
We have studied single-electron injection into individual self-assembled CdSe/ZnSe quantum dots. Using nanostructured contacts to apply a vertical electric field, excess electrons are promoted to the single-quantum-dot ground state in a controlled fashion. Spatially-resolved photoluminescence spectroscopy is applied to demonstrate single-quantum-dot charging via the formation of single zero-dimensional charged excitons with a binding energy on the order of 10 meV. © 2003 American Institute of Physics.


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