https://doi.org/10.1140/epjb/e2012-30629-5
Regular Article
Distinguishability of stacks in ZnTe/ZnSe quantum dots via spectral analysis of Aharonov-Bohm oscillations*
1 Department of Physics, Queens College of CUNY, Flushing, NY-11367, USA
2 The Graduate Center of CUNY, New York, NY-10016, USA
3 Department of Chemistry, The City College of CUNY, New York, NY-10031, USA
a
e-mail: bidishae@gmail.com
b
e-mail: Igor.Kuskovsky@qc.cuny.edu
Received: 17 July 2012
Received in final form: 6 October 2012
Published online: 4 February 2013
A spectral analysis of the Aharonov-Bohm (AB) oscillations in photoluminescence intensity was performed for stacked type-II ZnTe/ZnSe quantum dots (QDs) fabricated within multilayered Zn-Se-Te system with sub-monolayer insertions of Te. Robust AB oscillations allowed for fine probing of distinguishable QDs stacks within the ensemble of QDs. The AB transition magnetic field, BAB, changed from the lower energy side to the higher energy side of the PL spectra revealing the presence of different sets of QDs stacks. The change occurs within the spectral range, where the contributing green and blue bands of the spectra overlapped. “Bundling” in lifetime measurements is seen at transition spectral regions confirming the results.
Key words: Topical issue: Excitonic Processes in Condensed Matter, Nanostructured and Molecular Materials. Guest editors: Maria Antonietta Loi, Jasper Knoester and Paul H. M. van Loosdrecht
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2013