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 Voisin1 — 1Laboratoire 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).