Tunable optical Aharonov-Bohm effect in a semiconductor quantum ring

Details Tunable optical Aharonov-Bohm effect in a semiconductor quantum ring Tunable optical Aharonov-Bohm effect in a semiconductor quantum ring

2012-04-13

arxiv.org/abs/1204.3120v1

Phys. Rev. B 83, 115448 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.83.115448

By applying an electric field perpendicular to a semiconductor quantum ring we show that it is possible to modify the single particle wave function between quantum dot (QD)-like to ring-like. The constraints on the geometrical parameters of the quantum ring to realize such a transition are derived. With such a perpendicular electric field we are able to tune the Aharanov-Bohm (AB) effect for both single particles and for excitons. The tunability is in both the strength of the AB-effect as well as in its periodicity. We also investigate the strain induce potential inside the self assembled quantum ring and the effect of the strain on the AB effect.

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