Direct Observation of Controlled Coupling in an Individual Quantum Dot Molecule
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- 7 February 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 94 (5) , 057402
- https://doi.org/10.1103/physrevlett.94.057402
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.Keywords
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This publication has 18 references indexed in Scilit:
- Physics and applications of self‐assembled quantum dotsphysica status solidi (c), 2004
- Coherent control of tunneling in a quantum dot moleculePhysical Review B, 2004
- Exciton Dephasing in Quantum Dot MoleculesPhysical Review Letters, 2003
- An All-Optical Quantum Gate in a Semiconductor Quantum DotScience, 2003
- Fine Structure of Excitons inCoupled Quantum Dots: A Sensitive Test of Electronic CouplingPhysical Review Letters, 2003
- Coherent properties of a two-level system based on a quantum-dot photodiodeNature, 2002
- Coupling and Entangling of Quantum States in Quantum Dot MoleculesScience, 2001
- Quantum Information Processing with Semiconductor MacroatomsPhysical Review Letters, 2000
- Coupled Quantum Dots Fabricated by Cleaved Edge Overgrowth: From Artificial Atoms to MoleculesScience, 1997
- Vertically Self-Organized InAs Quantum Box Islands on GaAs(100)Physical Review Letters, 1995