title: Dielectric GaAs antenna ensuring an efficient broadband coupling between an InAs quantum dot and a Gaussian optical beam.
abstract: We introduce the photonic trumpet, a dielectric structure which ensures a nearly perfect coupling between an embedded quantum light source and a Gaussian free-space beam. A photonic trumpet exploits both the broadband spontaneous emission control provided by a single-mode photonic wire and the expansion of this mode within a conical taper. Numerical simulations highlight the performance and robustness of this concept. As a first application in the field of quantum optics, we report the realization of an ultrabright single-photon source. The device, a high aspect ratio GaAs photonic trumpet containing a few InAs quantum dots, demonstrates a first-lens external efficiency of 0.75±0.1 and an external coupling efficiency to a Gaussian beam as high as 0.58±0.08.
authors.affiliation: CEA-CNRS-UJF Group, Nanophysique et Semiconducteurs, CEA, INAC, SP2M, F-38054 Grenoble, France.
authors.forename: Mathieu
authors.initials: M
authors.lastname: Munsch
authors.forename: Nitin S
authors.initials: NS
authors.lastname: Malik
authors.forename: Emmanuel
authors.initials: E
authors.lastname: Dupuy
authors.forename: Adrien
authors.initials: A
authors.lastname: Delga
authors.forename: Joël
authors.initials: J
authors.lastname: Bleuse
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Gérard
authors.forename: Julien
authors.initials: J
authors.lastname: Claudon
authors.forename: Niels
authors.initials: N
authors.lastname: Gregersen
authors.forename: Jesper
authors.initials: J
authors.lastname: Mørk