Dark exciton optical spectroscopy of a semiconducting quantum dot embedded in a nanowire

Photoluminescence of a single CdSe quantum dot embedded in a ZnSe nanowire has been investigated. It has been found that the dark exciton has a strong influence on the optical properties. The most visible influence is the strongly reduced excitonic emission compared to the biexcitonic one. Temperatu...

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Bibliographic Details
Published in:arXiv.org 2009-03
Main Authors: Sallen, Gregory, Tribu, Adrien, Aichele, Thomas, André, Régis, Besombes, Lucien, Bougerol-Chaillout, Catherine, Tatarenko, Serge, Kuntheak Kheng, Poizat, Jean-Philippe
Format: Article
Language:English
Subjects:
Cadmium selenides
Emissions control
Excitation spectra
Excitons
Nanowires
Optical properties
Photoluminescence
Quantum dots
Temperature dependence
Zinc selenide
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Summary:Photoluminescence of a single CdSe quantum dot embedded in a ZnSe nanowire has been investigated. It has been found that the dark exciton has a strong influence on the optical properties. The most visible influence is the strongly reduced excitonic emission compared to the biexcitonic one. Temperature dependent lifetime measurements have allowed us to measure a large splitting of \(\Delta E = 6 \) meV between the dark and the bright exciton as well as the spin flip rates between these two states.
ISSN:2331-8422
DOI:10.48550/arxiv.0903.0497