Effective tuning of exciton polarization splitting in coupled quantum dots

Details Effective tuning of exciton polarization splitting in coupled quantum dots Effective tuning of exciton polarization splitting in coupled quantum dots

2007-04-30

arxiv.org/abs/0704.3871v2

Appl. Phys. Lett. 90, 261119 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures, to appear in Appl. Phys. Lett

Scientific paper

10.1063/1.2753116

The polarization splitting of the exciton ground state in two laterally coupled quantum dots under an in-plane electric field is investigated and its effective tuning is designed. It is found that there are significant Stark effect and anticrossing in energy levels. Due to coupling between inter- and intra-dot states, the absolute value of polarization splitting is significantly reduced, and it could be tuned to zero by the electric field for proper inter-dot separations. Our scheme is interesting for the research on the quantum dots-based entangled-photon source.

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