Principal Investigators: Dr Jean Philippe Poizat / Dr Jean-Xavier Boucherle

The Project 

CNRSGRE is investigating different resonant excitation strategies to obtain Fourier-transform single photons from CdSe/ZnSe quantum dots. This is the first step towards delivering visible single entangled pairs in CdSe/ZnSe quantum dots. The work under progress studies photoluminescence excitation spectroscopy of CdSe/ZnSe quantum dots under two-photon excitation.

Superconducting single photon detectors

CNRSGRE is developing superconducting detectors using NbN ultrathin (4 nm) films. These detectors are very attractive for counting photon at telecom wavelength 1.3 and 1.55 microns, with very low dark counts and very high maximum counting rates.

List of Publications

QAP

[1] C. Simon, Y.M. Niquet, X. Caillet, J. Eymery, J.P. Poizat, J.M. Gérard, Quantum Communication with Quantum Dot Spins, Phys. Rev. B 75, 081302 (2007)

M. Tarkhov, J. Claudon, J. Ph. Poizat et al, Ultrafast reset time of superconducting single photon detectors, App. Phys. Lett. 92 241112 (2008)

Related work

[2] C. Delacour, J. Claudon, J.-Ph. Poizat, B. Pannetier, and V. Bouchiat, R. Espiau de Lamaestre, J.-C. Villegier, M. Tarkhov, A. Korneev, B. Voronov, and G. Gol’tsman, Superconducting single photon detectors made by local oxidation with an atomic force microscope, Appl. Phys. Lett. 90, 191116 (2007)

[3] A. Auffèves-Garnier, C. Simon, J.M. Gérard, J.P. Poizat, Giant Optical Non-linearity induced by a Single Two-Level System interacting with a Cavity in the Purcell Regime, to appear in Phys. Rev. A (2007)

Group Website