Picosecond charge variation of quantum dots under pulsed excitation

T. Kazimierczuk, M. Goryca, M. Koperski, A. Golnik, J. A. Gaj, M. Nawrocki, P. Wojnar, and P. Kossacki
Phys. Rev. B 81, 155313 – Published 19 April 2010

Abstract

We present a spectroscopic study of excitation dynamics in self-assembled CdTe/ZnTe quantum dots. Insight into details of kinetics is obtained from the time-resolved microphotoluminescence, single photon correlation, and subpicosecond excitation correlation measurements done on single quantum dots. It is shown that the pulsed excitation at an energy above the energy gap of the barrier material results in separate capture of electrons and holes. We found that the capture of electrons by the quantum dot is delayed with respect to the capture of holes: the electron capture takes place in 20–40 ps after the excitation pulse, while the capture of holes is much faster.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
4 More
  • Received 3 December 2009

DOI:https://doi.org/10.1103/PhysRevB.81.155313

©2010 American Physical Society

Authors & Affiliations

T. Kazimierczuk1,*, M. Goryca1,2, M. Koperski1, A. Golnik1, J. A. Gaj1, M. Nawrocki1, P. Wojnar3, and P. Kossacki1,2

  • 1Institute of Experimental Physics, University of Warsaw, Hoża 69, PL-00-681 Warszawa, Poland
  • 2Grenoble High Magnetic Field Laboratory, B.P. 166, 38-042 Grenoble, France
  • 3Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/64, 02-688 Warsaw, Poland

  • *tomasz.kazimierczuk@fuw.edu.pl

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 81, Iss. 15 — 15 April 2010

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
×