Ultrafast electric control of cavity mediated single-photon and photon-pair generation with semiconductor quantum dots

Single-photon generation with InAs quantum dots

Single-photon generation using InAs quantum dots in pillar microcavities is described. The effects on performance of the excitation wavelength and polarization, and the collection bandwidth and polarization, are studied in detail. The efficiency and photon state purity of these devices have been measured, and issues affecting these parameters are discussed. Prospects for improved devices are al...

Single Photon Generation in Epitaxial Quantum Dots

Entangled photon pairs from semiconductor quantum dots.

Tomographic analysis demonstrates that the polarization state of pairs of photons emitted from a biexciton decay cascade becomes entangled when spectral filtering is applied. The measured density matrix of the photon pair satisfies the Peres criterion for entanglement by more than 3 standard deviations of the experimental uncertainty and violates Bell's inequality. We show that the spectral fil...

Single-photon and photon-pair emission from CdSe/Zn(S,Se) quantum dots

S. Strauf 1 , S. M. Ulrich 1 , K. Sebald 1 , P. Michler *,1 , T. Passow 2 , D. Hommel 2 , G. Bacher 3 , and A. Forchel 1 Institute for Solid State Physics, Semiconductor Optics, University of Bremen, P.O. Box 330440, 28334 Bremen, Germany 2 Institute for Solid State Physics, Semiconductor Epitaxy, University of Bremen, P.O. Box 330440, 28334 Bremen, Germany 3 Technical Physics, University of Wü...

Cavity quantum electrodynamics with semiconductor quantum dots

Cavity quantum electrodynamics with semiconductor quantum dots Pascale Senellart CNRS, Laboratoire de Photonique et de Nanostructures, Marcoussis, France Many quantum devices can be implemented by controlling the spontaneous emission of a semiconductor quantum dots in a microcavity: bright sources of quantum light, delayed photon entangler, optical quantum gates... In this talk, I will present ...