Brightening of dark excitons in a single quantum dot containing a single magnetic ion

Details Brightening of dark excitons in a single quantum dot containing a single magnetic ion Brightening of dark excitons in a single quantum dot containing a single magnetic ion

2010-06-08

arxiv.org/abs/1006.1488v1

Phys. Rev. B 82, 165323 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.82.165323

A promising method to investigate dark exciton transitions in quantum dots is presented. The optical recombination of the dark exciton is allowed when the exciton state is coupled with an individual magnetic impurity (manganese ion). It is shown that the efficient radiative recombination is possible when the exchange interaction with the magnetic ion is accompanied by a mixing of the heavy-light hole states related to an in-plane anisotropy of the quantum dot. It is also shown that the dark exciton recombination is an efficient channel of manganese spin orientation.

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