Distinguishability of stacks in ZnTe/ZnSe quantum dots via spectral analysis of Aharonov-Bohm oscillations

  • Bidisha Roy
  • Haojie Ji
  • Siddharth Dhomkar
  • Fred J. Cadieu
  • Le Peng
  • Richard Moug
  • Maria C. Tamargo
  • Igor L. Kuskovsky
Regular Article
  • 216 Downloads
Part of the following topical collections:
  1. Topical issue: Excitonic Processes in Condensed Matter, Nanostructured and Molecular Materials

Abstract

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, B AB , 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.

Keywords

Topical issue: Excitonic Processes in Condensed Matter, Nanostructured and Molecular Materials. Guest editors: Maria Antonietta Loi, Jasper Knoester and Paul H. M. van Loosdrecht 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Bidisha Roy
    • 1
    • 2
  • Haojie Ji
    • 1
    • 2
  • Siddharth Dhomkar
    • 1
    • 2
  • Fred J. Cadieu
    • 1
    • 2
  • Le Peng
    • 2
    • 3
  • Richard Moug
    • 3
  • Maria C. Tamargo
    • 2
    • 3
  • Igor L. Kuskovsky
    • 1
    • 2
  1. 1.Department of PhysicsQueens College of CUNYFlushingUSA
  2. 2.The Graduate Center of CUNYNew YorkUSA
  3. 3.Department of ChemistryThe City College of CUNYNew YorkUSA

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