Stark effect and polarizability in a single CdSe/ZnSe quantum dot

J. Seufert, M. Obert, M. Scheibner, N. A. Gippius, G. Bacher, A. Forchel, T. Passow, K. Leonardi, D. Hommel

Research output: Contribution to journalArticlepeer-review

96 Citations (Scopus)

Abstract

The quantum-confined Stark effect in a single self-assembled CdSe/ZnSe quantum dot was studied by means of highly spatially resolved photoluminescence spectroscopy. A nanotechnological approach making use of a capacitor-like geometry enabled us to apply a well-defined lateral electric field on the quantum dots. Stark shifts of up to 1.1 meV were obtained, which can be well fitted by a purely quadratic dependence on an electric field. In quite good agreement with theoretical calculations, an exciton polarizability of 4.9×10-3 meV/(kV/cm)2 can be extracted, while the permanent dipole moment in the lateral direction is found to be negligible.

Original languageEnglish
Pages (from-to)1033-1035
Number of pages3
JournalApplied Physics Letters
Volume79
Issue number7
DOIs
Publication statusPublished - 13 Aug 2001
Externally publishedYes

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