Polarization of the photoluminescence of quantum dots incorporated into quantum wires

The photoluminescence spectra of individual quantum dots incorporated into a quantum wire are studied. From the behavior of the spectra in a magnetic field, it is possible to estimate the exciton binding energy in a quantum dot incorporated into a quantum wire. It is found that the exciton photolumi...

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Bibliographic Details
Published in:Semiconductors (Woodbury, N.Y.) N.Y.), 2016-12, Vol.50 (12), p.1647-1650
Main Authors: Platonov, A. V., Kochereshko, V. P., Kats, V. N., Cirlin, G. E., Bouravleuv, A. D., Avdoshina, D. V., Delga, A., Besombes, L., Mariette, H.
Format: Article
Language:English
Subjects:
2016
BINDING ENERGY
Condensed Matter
EMISSION SPECTRA
Energy (Physics)
EXCITONS
Linear polarization
MAGNETIC FIELDS
Magnetic Materials
Magnetism
March 14–18
MATERIALS SCIENCE
NANOSCIENCE AND NANOTECHNOLOGY
NANOWIRES
Nizhny Novgorod
Other
PHOTOLUMINESCENCE
Physics
Physics and Astronomy
POLARIZATION
POTENTIALS
QUANTUM DOTS
QUANTUM WIRES
Wire
XX International Symposium “Nanophysics and Nanoelectronics”
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Summary:The photoluminescence spectra of individual quantum dots incorporated into a quantum wire are studied. From the behavior of the spectra in a magnetic field, it is possible to estimate the exciton binding energy in a quantum dot incorporated into a quantum wire. It is found that the exciton photoluminescence signal emitted from a quantum dot along the direction of the nanowire axis is linearly polarized. At the same time, the photoluminescence signal propagating in the direction orthogonal to the nanowire axis is practically unpolarized. The experimentally observed effect is attributed to the nonaxial arrangement of the dot in the wire under conditions of a huge increase in the exciton binding energy due to the effect of the image potential on the exciton.
ISSN:1063-7826
1090-6479
DOI:10.1134/S1063782616120150