Characterization of the Shell Structure in Coupled Quantum Dots through Resonant Optical Probing

Excited states in single quantum dots (QDs) have been shown to be useful for spin state initialization and manipulation. For scalable quantum information processing it is necessary to have multiple spins interacting. Therefore, we present initial results from photoluminescence excitation studies of...

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Bibliographic Details
Published inarXiv.org
Main Authors Garrido, Mauricio, Wijesundara, Kushal C, Ramanathan, Swati, Stinaff, E A, Scheibner, M, Bracker, A S, Gammon, D
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 12.03.2009
Subjects
Data processing
Excitation
Photoluminescence
Quantum dots
Quantum phenomena
Quantum theory
Structural analysis
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Summary:Excited states in single quantum dots (QDs) have been shown to be useful for spin state initialization and manipulation. For scalable quantum information processing it is necessary to have multiple spins interacting. Therefore, we present initial results from photoluminescence excitation studies of excited states in coupled quantum dots (CQDs). Due to the rich set of possible excitation and recombination possibilities, a technique for visualizing photoluminescence excitation in coupled quantum dots is discussed, by which both the interaction between the dots and the type of absorption and emission that generated the photoluminescence is easily and clearly revealed. As an example, this technique is applied to characterize the shell structure of the hole in the top dot and the results are compared with those using Level Anti-Crossing Spectroscopy (LACS).
ISSN:2331-8422