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Dresden 2011 – scientific programme

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SYQE: Intersectional Symposium Cavity meets Circuit Quantum Electrodynamics

SYQE 1: Cavity meets Circuit Quantum Electrodynamics

SYQE 1.5: Invited Talk

Friday, March 18, 2011, 12:30–13:00, HSZ 01

Quantum dot based bright sources of quantum light. — •Pascale Senellart1, Adrien Dousse1, Jan Suffczynski1,2, Vivien Loo1, Steffen Michaelis de Vasconcellos1, Olivier Gazzano1, Loic Lanco1, Aristide Lemaitre1, Isabelle Sagnes1, Alexios Beveratos1, Olivier Krebs1, Jacqueline Bloch1, and Paul Voisin11Laboratoire de Photonique et de Nanostructures, CNRS, Route de Nozay, 91460 Marcoussis, FRANCE — 2Present address: Institute of Experimental Physics, University of Warsaw, 69 Hoz.a Street, 00-681 Warsaw, Poland.

A single semiconductor quantum dot (QD) is a promising system to achieve a solid-state source of single photons or entangled photon pairs. Controlling the radiative lifetime of a QD in the weak coupling regime (Purcell effect) is a way to make sure that the photons emitted by the QD are funnelled into a cavity mode and efficiently collected. For the last few years, the main challenge has been to control both the spectral and spatial matching between a single QD and a cavity mode. We have developed an in-situ lithography technique that allows deterministically coupling a single QD to a cavity mode [1]. Using this technique, we demonstrate the scalable fabrication of ultrabright sources of single photons or of entangled photon pairs [2]. The same technique is also used to demonstrate on- demand strong coupling regime between a QD and a cavity mode. In this regime, we evidence optical non-linearities on a few photon scales.

[1] A. Dousse et al., Phys. Rev. Lett. 101, 267404 (2008) [2] A. Dousse et al, Nature 466, 217 (2010).

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