Direct Observation of Controlled Coupling in an Individual Quantum Dot Molecule

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dc.creatorKrenner, H. J.
dc.creatorSabathil, M.
dc.creatorClark, E. C.
dc.creatorKress, A. F.
dc.creatorSchuh, D.
dc.creatorBichler, M.
dc.creatorAbstreiter, G.
dc.creatorFinley, J. J.
dc.date2004-10-08
dc.date2004-12-21
dc.date.accessioned2026-07-07T06:37:18Z
dc.date.available2026-07-07T06:37:18Z
dc.descriptionWe report the direct observation of quantum coupling in individual quantum dot molecules and its manipulation using static electric fields. A pronounced anti-crossing of different excitonic transitions is observed as the electric field is tuned. Comparison of our experimental results with theory shows that the observed anti-crossing occurs between excitons with predominant spatially \emph{direct} and \emph{indirect} character. The electron component of the exciton wavefunction is shown to have molecular character at the anti-crossing and the quantum coupling strength is deduced optically. In addition, we determine the dependence of the coupling strength on the inter-dot separation and identify a field driven transition of the nature of the molecular ground state.
dc.description11 pages, 4 figures submitted to Physical Review Letters
dc.identifierhttps://arxiv.org/abs/cond-mat/0410206
dc.identifierhttp://arxiv.org/abs/cond-mat/0410206
dc.identifierPhys. Rev. Lett. 94, 057402 (2005)
dc.identifierdoi:10.1103/PhysRevLett.94.057402
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/100343
dc.subjectMesoscale and Nanoscale Physics
dc.subjectOptics
dc.titleDirect Observation of Controlled Coupling in an Individual Quantum Dot Molecule
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