Controlling the charge environment of single quantum dots in a photonic-crystal cavity

Autor:	Chauvin, N., Zinoni, C., Francardi, M., Gerardino, A., Balet, L., Alloing, B., Li, L. H., Fiore, A.
Rok vydání:	2009
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. B 80, 241306(R) (2009)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.80.241306
Popis:	We demonstrate that the presence of charge around a semiconductor quantum dot (QD) strongly affects its optical properties and produces non-resonant coupling to the modes of a microcavity. We first show that, besides (multi)exciton lines, a QD generates a spectrally broad emission which efficiently couples to cavity modes. Its temporal dynamics shows that it is related to the Coulomb interaction between the QD (multi)excitons and carriers in the adjacent wetting layer. This mechanism can be suppressed by the application of an electric field, making the QD closer to an ideal two-level system. Comment: 12 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0907.3392 Zobrazit plný text záznamu View this record from Arxiv