Exciton storage in type-ll quantum dots using the optical Aharonov-Bohm effect
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Title
Exciton storage in type-ll quantum dots using the optical Aharonov-Bohm effectDate
2014-05-12Publisher
AIP PublishingBibliographic citation
CLIMENTE PLASENCIA, J. I.; PLANELLES FUSTER, J. Exciton storage in type-ll quantum dots using the optical Aharonov-Bohm effect. Applied Physics, Letter, v. 104, n. 19 (2014), p. 1-5Type
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Abstract
We investigate the bright-to-dark exciton conversion efficiency in type-II quantum dots subject to a
perpendicular magnetic field. To this end, we take the exciton storage protocol recently proposed
by Simonin and ... [+]
We investigate the bright-to-dark exciton conversion efficiency in type-II quantum dots subject to a
perpendicular magnetic field. To this end, we take the exciton storage protocol recently proposed
by Simonin and co-workers [Phys. Rev. B 89, 075304 (2014)] and simulate its coherent dynamics.
We confirm the storage is efficient in perfectly circular structures subject to weak external electric
fields, where adiabatic evolution is dominant. In practice, however, the efficiency rapidly degrades
with symmetry lowering. Besides, the use of excited states is likely unfeasible owing to the fast
decay rates. We then propose an adaptation of the protocol which does not suffer from these
limitations [-]
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Applied Physics, Letter, v. 104, n. 19 (2014)Rights
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