Electric and magnetic field manipulation and storage of charge-tunable excitons
The excitonic spectrum of radially polarized semiconductor rings has been analyzed theoretically, in the presence of an in-plane electric field and a perpendicular magnetic field. Based on the numerically exact solution, a regime has been found where the exciton behaves as a single carrier or quasip...
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| Veröffentlicht in: | Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2014-02, Vol.89 (7), Article 075304 |
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| container_title | Physical review. B, Condensed matter and materials physics |
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| creator | Simonin, J. Proetto, C. R. Pacheco, M. Barticevic, Z. |
| description | The excitonic spectrum of radially polarized semiconductor rings has been analyzed theoretically, in the presence of an in-plane electric field and a perpendicular magnetic field. Based on the numerically exact solution, a regime has been found where the exciton behaves as a single carrier or quasiparticle, with an effective and tunable electric charge determined by the ring geometry. A protocol is proposed for the storage of excitons without destroying them, consisting in converting them from "bright" to "dark," by performing a sequence of well-defined steps. Accurate analytical approximations are provided for each of the exciton regimens found: quasifree, locked, and broken. |
| doi_str_mv | 10.1103/PhysRevB.89.075304 |
| format | Article |
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B, Condensed matter and materials physics</title><description>The excitonic spectrum of radially polarized semiconductor rings has been analyzed theoretically, in the presence of an in-plane electric field and a perpendicular magnetic field. Based on the numerically exact solution, a regime has been found where the exciton behaves as a single carrier or quasiparticle, with an effective and tunable electric charge determined by the ring geometry. A protocol is proposed for the storage of excitons without destroying them, consisting in converting them from "bright" to "dark," by performing a sequence of well-defined steps. 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| fulltext | fulltext |
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| ispartof | Physical review. B, Condensed matter and materials physics, 2014-02, Vol.89 (7), Article 075304 |
| issn | 1098-0121 1550-235X |
| language | eng |
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| source | American Physical Society Journals |
| subjects | Approximation Condensed matter Exact solutions Excitation spectra Excitons Magnetic fields Mathematical analysis Semiconductors |
| title | Electric and magnetic field manipulation and storage of charge-tunable excitons |
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