Electrical control of the exciton-biexciton splitting in a single self-assembled InGaAs quantum dots

Details Electrical control of the exciton-biexciton splitting in a single self-assembled InGaAs quantum dots Electrical control of the exciton-biexciton splitting in a single self-assembled InGaAs quantum dots

2010-09-10

arxiv.org/abs/1009.1989v2

Nanotechnolgy 22, 324202 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We report on single InGaAs quantum dots embedded in a lateral electric field device. By applying a voltage we tune the neutral exciton transition into resonance with the biexciton using the quantum confined Stark effect. The results are compared to theoretical calculations of the relative energies of exciton and biexciton. Cascaded decay from the manifold of single exciton-biexciton states has been predicted to be a new concept to generate entangled photon pairs on demand without the need to suppress the fine structures splitting of the neutral exciton.

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