Semimagnetic (Cd,Mn)Te single quantum dots — technological access and optical spectroscopy

An alternative technological approach for the realization of (Cd,Mn)Te nanostructures is presented. Focused ion beam lithography and subsequent thermal annealing are used for a lateral modulation of the bandgap, allowing both, the realization of quantum wires and quantum dots with adjustable size an...

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Bibliographic Details
Published in:Journal of crystal growth 2000-06, Vol.214, p.150-153
Main Authors: Kümmell, T, Bacher, G, Welsch, M.K, Eisert, D, Forchel, A, König, B, Becker, Ch, Ossau, W, Landwehr, G
Format: Article
Language:English
Subjects:
CdMnTe
Focused ion beam lithography
Single quantum dots
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Summary:An alternative technological approach for the realization of (Cd,Mn)Te nanostructures is presented. Focused ion beam lithography and subsequent thermal annealing are used for a lateral modulation of the bandgap, allowing both, the realization of quantum wires and quantum dots with adjustable size and a well-defined lateral potential. Due to the high quantum efficiency of the buried nanostructures, photoluminescence spectroscopy even on single quantum dots becomes accessible, allowing an experimental insight on optical transitions in three-dimensionally confined semimagnetic structures.
ISSN:0022-0248
1873-5002
DOI:10.1016/S0022-0248(00)00052-X