title: Generation, guiding and splitting of triggered single photons from a resonantly excited quantum dot in a photonic circuit.
abstract: We demonstrate resonance fluorescence from single In-GaAs/GaAs quantum dots embedded in a rib waveguide beamsplitter structure operated under pulsed laser excitation. A systematic study on the excitation laser pulse duration depicts that a sufficiently small laser linewidth enables a substantial improved single-photon-to-laser-background ratio inside a waveguide chip. This manifests in the observation of clear Rabi oscillations over two periods of the quantum dot emission as a function of laser excitation power. A photon cross-correlation measurement between the two output arms of an on-chip beamsplitter results in a g(2)(0)=0.18, demonstrating the generation, guiding and splitting of triggered single photons under resonant excitation in an on-chip device. The present results open new perspectives for the implementation of photonic quantum circuits with integrated quantum dots as resonantly-pumped deterministic single-photon sources.
authors.forename: Mario
authors.initials: M
authors.lastname: Schwartz
authors.forename: Ulrich
authors.initials: U
authors.lastname: Rengstl
authors.forename: Thomas
authors.initials: T
authors.lastname: Herzog
authors.forename: Matthias
authors.initials: M
authors.lastname: Paul
authors.forename: Jan
authors.initials: J
authors.lastname: Kettler
authors.forename: Simone Luca
authors.initials: SL
authors.lastname: Portalupi
authors.forename: Michael
authors.initials: M
authors.lastname: Jetter
authors.forename: Peter
authors.initials: P
authors.lastname: Michler