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Phys Rev Lett. 2005 Apr 22;94(15):157401. Epub 2005 Apr 19.

Control of vertically coupled InGaAs/GaAs quantum dots with electric fields.

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  • 1Experimentelle Physik II, Universit├Ąt Dortmund, D-44221 Dortmund, Germany.


Controllable interactions that couple quantum dots are a key requirement in the search for scalable solid state implementations for quantum information technology. From optical studies of excitons and corresponding calculations, we demonstrate that an electric field on vertically coupled pairs of In(0.6)Ga(0.4)As/GaAs quantum dots controls the mixing of the exciton states on the two dots and also provides controllable coupling between carriers in the dots.

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