Photonic nanowires : a new geometry to realize bright sources of quantum light
type: Dataset
description: This thesis presents the realization of an efficient single-photon source based on an InAs quantum dot integrated in a photonic nanowire. A photonic nanowire is a monomode waveguide made of a high refractive index material (GaAs in our case). For an optimal wire diameter around 200 nm, nearly all the spontaneous emission of the embedded single-photon emitter (free space wavelength 950 nm) is funnelled into the fundamental guided mode. In addition, the outcoupling efficiency of the guided photon to a microscope objective can be brought close to one with a proper engineering of the wire ends. The source thus features an integrated bottom mirror and a smooth tapering of the wire upper end. High performances are maintained over a broad wavelength range, a key asset of this 1D photonic structure. This thesis presents the physics which governs these structures, their realization, and their characterization. Under pulsed optical pumping, we demonstrate a single-photon source with a record efficiency of 0.72, combined with highly pure single-photon emission. We also discuss the possibility to obtain polarization control, using wire with an elliptical section.
identifier: NNT: 2011GRENY069
issued: 2026-05-23T17:55:22.693511
language: fr
modified: 2026-05-23T17:55:22.693519
contact point: Organization
  fn: CCSD
keyword: boites-quantiques
keyword: fils-photoniques
keyword: iii-v-semiconductors
keyword: infoeu-reposemanticsdoctoralthesis
keyword: lumiere-quantique
keyword: nanophotonics
keyword: nanophotonique
keyword: photonic-nanowires
keyword: physphysphysics-physicsphysics-physics
keyword: quantum-dot
keyword: quantum-light
keyword: semiconducteurs-iii-v
keyword: theses
landing page: https://theses.hal.science/tel-00681846

Photonic nanowires : a new geometry to realize bright sources of quantum light
type: Distribution
format: HTML
issued: 2026-05-23T17:55:22.705152
modified: 2026-05-23T17:55:22.633610
access URL: https://theses.hal.science/tel-00681846

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type: Agent