Direct observation of controlled coupling in an individual quantum dot molecule

H. J. Krenner, M. Sabathil, E. C. Clark, A. Kress, D. Schuh, M. Bichler, G. Abstreiter, J. J. Finley

Research output: Contribution to journalArticlepeer-review

352 Scopus citations

Abstract

We report the direct observation of quantum coupling in individual quantum dot molecules and its manipulation using static electric fields. A pronounced anticrossing of different excitonic transitions is observed as the electric field is tuned. A comparison of our experimental results with theory shows that the observed anticrossing occurs between excitons with predominant spatially direct and indirect character and reveals a field driven transition of the nature of the molecular ground state exciton wave function. Finally, the interdot quantum coupling strength is deduced optically and its dependence on the interdot separation is calculated.

Original languageEnglish
Article number057402
JournalPhysical Review Letters
Volume94
Issue number5
DOIs
StatePublished - 11 Feb 2005

Fingerprint

Dive into the research topics of 'Direct observation of controlled coupling in an individual quantum dot molecule'. Together they form a unique fingerprint.

Cite this