TITLE

Temperature influence on optical charging of self-assembled InAs/GaAs semiconductor quantum dots

AUTHOR(S)
Karlsson, K. F.; Moskalenko, E. S.; Holtz, P. O.; Monemar, B.; Schoenfeld, W. V.; Garcia, J. M.; Petroff, P. M.
PUB. DATE
May 2001
SOURCE
Applied Physics Letters;5/7/2001, Vol. 78 Issue 19, p2952
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
It is demonstrated that the photoluminescence spectra of single self-assembled InAs/GaAs quantum dots are very sensitive to excitation energy and crystal temperature. This is qualitatively explained in terms of the effective diffusivity of photogenerated particles, which affects the capture probability of the quantum dot. As a consequence, this opens the possibility of controlling the average number of excess electrons in the quantum dot by optical means. This technique may be used as a simple tool to create and study charged exciton complexes without any specially fabricated samples. © 2001 American Institute of Physics.
ACCESSION #
4710403

 

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