Polarization of the photoluminescence of quantum dots incorporated into quantum wires

Journal Article · Thu Dec 15 04:00:00 EST 2016 · Semiconductors

DOI:https://doi.org/10.1134/S1063782616120150· OSTI ID:22645277

Kochereshko, V. P.; Kats, V. N.; Cirlin, G. E.; Bouravleuv, A. D.; Avdoshina, D. V. ^[1]; Delga, A.; Besombes, L.; Mariette, H. ^[2]

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1. Russian Academy of Sciences, Ioffe Physical–Technical Institute (Russian Federation)
2. CEA, INAC, SP2M, and Institut Néel, CEA-CNRS group “Nanophysique et Semiconducteurs” (France)

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.

• OSTI ID: 22645277
• Journal Information: Semiconductors, Journal Name: Semiconductors Journal Issue: 12 Vol. 50; ISSN SMICES; ISSN 1063-7826
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
BINDING ENERGY
EMISSION SPECTRA
EXCITONS
MAGNETIC FIELDS
NANOWIRES
PHOTOLUMINESCENCE
POLARIZATION
POTENTIALS
QUANTUM DOTS
QUANTUM WIRES