Subnanosecond spectral diffusion of a single quantum dot in a nanowire

Gregory Sallen (1) , Adrien Tribu (2) , Thomas Aichele (3) , Régis André (1) , Lucien Besombes (1) , Catherine Bougerol (1) , Maxime Richard (1) , Serge Tatarenko (1) , Kuntheak Kheng (2) , Jean-Philippe Poizat (1)

1 NEEL - NPSC - Nanophysique et Semiconducteurs
2 SP2M - UMR 9002 - Service de Physique des Matériaux et Microstructures
3 HU Berlin - Humboldt-Universität zu Berlin = Humboldt University of Berlin = Université Humboldt de Berlin

We have studied spectral diffusion of the photoluminescence of a single CdSe quantum dot inserted in a ZnSe nanowire. We have measured the characteristic diffusion time as a function of pumping power and temperature using a recently developed technique [G. Sallen et al., Nat. Photon. 4, 696 (2010)] that offers subnanosecond resolution. These data are consistent with a model where only a single carrier wanders around in traps located in the vicinity of the quantum dot.

Mots clés: Quantum dot; spectroscopy; spectral diffusion

Domaines: Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]

Gregory Sallen, Adrien Tribu, Thomas Aichele, Régis André, Lucien Besombes, et al.. Subnanosecond spectral diffusion of a single quantum dot in a nanowire. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2011, 84, pp.041405(R). ⟨10.1103/PhysRevB.84.041405⟩. ⟨hal-00998974⟩