Manipulating the spin polarization of excitons in a single quantum dot by optical means

Circular polarization studies of photoluminescence from the neutral (X0) and the positively charged (X+) excitons are reported for individual InAs/GaAs quantum dots (QDs). High polarization degrees, 60% for X0 and 73% for X+, were recorded without any external magnetic field applied. These studies s...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics letters 2011-02, Vol.98 (7), p.071906
Main Authors: Larsson, L. A., Moskalenko, E. S., Holtz, P. O.
Format: Article
Language:English
Subjects:
NATURAL SCIENCES
NATURVETENSKAP
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Circular polarization studies of photoluminescence from the neutral (X0) and the positively charged (X+) excitons are reported for individual InAs/GaAs quantum dots (QDs). High polarization degrees, 60% for X0 and 73% for X+, were recorded without any external magnetic field applied. These studies show that the QD polarization and population dynamics are controllable either by varying the photoexcitation intensity or by using a second IR laser excitation.
ISSN:0003-6951
1077-3118
1077-3118
DOI:10.1063/1.3554422