Resonant photoluminescence imaging and the origin of excited states in self-assembled quantum dots

T. A. Nguyen, S. Mackowski, T. B. Hoang, H. E. Jackson, L. M. Smith, and G. Karczewski
Phys. Rev. B 76, 245320 – Published 20 December 2007

Abstract

We image single quantum dot excitations using high-resolution slit-confocal microscopy in order to elucidate the nature of the excited states of single CdTe quantum dots. The results show subsets of single dots distinguished by unique excitation spectra and spatially separated by hundreds of nanometers. We conclude that the dots are superimposed on an extended two-dimensional platelet. Model simulations, which yield common resonances for two quantum dots superimposed on a microscopic wire, support this interpretation.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 9 August 2007

DOI:https://doi.org/10.1103/PhysRevB.76.245320

©2007 American Physical Society

Authors & Affiliations

T. A. Nguyen, S. Mackowski*, T. B. Hoang, H. E. Jackson, and L. M. Smith

  • Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221-0011, USA

G. Karczewski

  • Institute of Physics PAS, Al. Lotników 32/46, 02-668 Warsaw, Poland

  • *Corresponding author. Present address: Department of Chemistry and Biochemistry, Ludwig Maximillian University, Butenandtstrasse 11, Haus E, 81377 Munich, Germany; FAX: +4989/2180-77548; sebastian.mackowski@cup.uni-muenchen.de

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 76, Iss. 24 — 15 December 2007

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×