title: Spontaneous emission enhancement of quantum dots in a photonic crystal wire.
abstract: Photonic wires are the simplest extended low-dimensional systems. Photonic crystal confinement confers them a divergent density of states at zero-group-velocity points, which leads to enhancement of spontaneous emission rates [D. Kleppner, Phys. Rev. Lett. 47, 233 (1981)10.1103/Phys. Rev. Lett. 47.233]. We experimentally evidence, for the first time, the spectral signature of these Purcell factor singularities, using the out-of-plane emission of InAs quantum dots buried in GaAs/AlGaAs based photonic crystal based wire. Additionally, in-plane collection at the wire exit shows large enhancements of the signal at some of the density of states singularities.
authors.affiliation: Laboratoire PMC, Ecole Polytechnique, 91128 Palaiseau, France.
authors.forename: E
authors.initials: E
authors.lastname: Viasnoff-Schwoob
authors.forename: C
authors.initials: C
authors.lastname: Weisbuch
authors.forename: H
authors.initials: H
authors.lastname: Benisty
authors.forename: S
authors.initials: S
authors.lastname: Olivier
authors.forename: S
authors.initials: S
authors.lastname: Varoutsis
authors.forename: I
authors.initials: I
authors.lastname: Robert-Philip
authors.forename: R
authors.initials: R
authors.lastname: Houdré
authors.forename: C J M
authors.initials: CJ
authors.lastname: Smith