Exciton storage in type-II quantum dots using the optical Aharonov-Bohm effect

Journal Article · Mon May 12 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4876479· OSTI ID:22273429

Climente, Juan I.; Planelles, Josep ^[1]

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1. Departament de Química Física i Analítica, Universitat Jaume I, E-12080 Castelló (Spain)

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.

• OSTI ID: 22273429
• Journal Information: Applied Physics Letters, Vol. 104, Issue 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AHARONOV-BOHM EFFECT
EFFICIENCY
ELECTRIC FIELDS
EXCITED STATES
EXCITONS
MAGNETIC FIELDS
QUANTUM DOTS