title: Optical nonlinearity for few-photon pulses on a quantum dot-pillar cavity device.
abstract: Giant optical nonlinearity is observed under both continuous wave and pulsed excitation in a deterministically coupled quantum dot-micropillar system, in a pronounced strong-coupling regime. Using absolute reflectivity measurements we determine the critical intracavity photon number as well as the input and output coupling efficiencies of the device. Thanks to a near-unity input-coupling efficiency, we demonstrate a record nonlinearity threshold of only 8 incident photons per pulse. The output-coupling efficiency is found to strongly influence this nonlinearity threshold. We show how the fundamental limit of single-photon nonlinearity can be attained in realistic devices, which would provide an effective interaction between two coincident single-photons.
authors.affiliation: Laboratoire de Photonique et Nanostructures, LPN/CNRS, Route de Nozay, 91460 Marcoussis, France.
authors.forename: V
authors.initials: V
authors.lastname: Loo
authors.forename: C
authors.initials: C
authors.lastname: Arnold
authors.forename: O
authors.initials: O
authors.lastname: Gazzano
authors.forename: A
authors.initials: A
authors.lastname: Lemaître
authors.forename: I
authors.initials: I
authors.lastname: Sagnes
authors.forename: O
authors.initials: O
authors.lastname: Krebs
authors.forename: P
authors.initials: P
authors.lastname: Voisin
authors.forename: P
authors.initials: P
authors.lastname: Senellart
authors.forename: L
authors.initials: L
authors.lastname: Lanco