Signatures of spin blockade in the optical response of a charged quantum dot

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KAVOUSANAKI, Eleftheria, Guido BURKARD, 2011. Signatures of spin blockade in the optical response of a charged quantum dot

@unpublished{Kavousanaki2011Signa-19243, title={Signatures of spin blockade in the optical response of a charged quantum dot}, year={2011}, author={Kavousanaki, Eleftheria and Burkard, Guido}, note={PDF auf arxiv-Server} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/19243"> <dc:contributor>Kavousanaki, Eleftheria</dc:contributor> <dcterms:title>Signatures of spin blockade in the optical response of a charged quantum dot</dcterms:title> <dcterms:rights rdf:resource="http://nbn-resolving.org/urn:nbn:de:bsz:352-20140905103605204-4002607-1"/> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/19243"/> <dc:rights>deposit-license</dc:rights> <dc:language>eng</dc:language> <dc:creator>Burkard, Guido</dc:creator> <dcterms:abstract xml:lang="eng">We model spin blockade for optically excited electrons and holes in a charged semiconductor quantum dot. We study the case where the quantum dot is initially charged with a single electron and is then filled with an additional, optically excited electron-hole pair, thus forming a charged exciton (trion). To make contact with recent experiments, we model an optical pump-probe setup, in which the two lowest quantum dot levels (s and p shells) are photo excited. Using the Lindblad master equation, we calculate the differential transmission spectrum as a function of the pump-probe time delay. Taking into account both spin conserving and spin-flip intraband relaxation processes, we find that the presence of the ground-state electron spin leads to an optical spin blockade at short delay times which is visible as a crossover between two exponential decays of the differential transmission. To make predictions for future experiments, we also study the dependence of the spin-blockade on an external magnetic field.</dcterms:abstract> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2012-05-10T10:11:57Z</dcterms:available> <dc:contributor>Burkard, Guido</dc:contributor> <dcterms:issued>2011</dcterms:issued> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2012-05-10T10:11:57Z</dc:date> <dc:creator>Kavousanaki, Eleftheria</dc:creator> </rdf:Description> </rdf:RDF>

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