info:eu-repo/semantics/article
Electric and magnetic field manipulation and storage of charge-tunable excitons
Fecha
2014-02Registro en:
Simonin, Jorge Marcos; Proetto, Cesar Ramon; Pacheco, Mónica; Barticevic, Z.; Electric and magnetic field manipulation and storage of charge-tunable excitons; American Physical Society; Physical Review B; 89; 7; 2-2014; 75304-1-75304-8
0163-1829
CONICET Digital
CONICET
Autor
Simonin, Jorge Marcos
Proetto, Cesar Ramon
Pacheco, Mónica
Barticevic, Z.
Resumen
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.