title: Highly indistinguishable on-demand resonance fluorescence photons from a deterministic quantum dot micropillar device with 74% extraction efficiency.
abstract: The implementation and engineering of bright and coherent solid state quantum light sources is key for the realization of both on chip and remote quantum networks. Despite tremendous efforts for more than 15 years, the combination of these two key prerequisites in a single, potentially scalable device is a major challenge. Here, we report on the observation of bright single photon emission generated via pulsed, resonance fluorescence conditions from a single quantum dot (QD) deterministically centered in a micropillar cavity device via cryogenic optical lithography. The brightness of the QD fluorescence is greatly enhanced on resonance with the fundamental mode of the pillar, leading to an overall device efficiency of η = (74 ± 4) % for a single photon emission as pure as g(2)(0) = 0.0092 ± 0.0004. The combination of large Purcell enhancement and resonant pumping conditions allows us to observe a two-photon wave packet overlap up to ν = (88 ± 3) %.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Unsleber
authors.forename: Yu-Ming
authors.initials: YM
authors.lastname: He
authors.forename: Stefan
authors.initials: S
authors.lastname: Gerhardt
authors.forename: Sebastian
authors.initials: S
authors.lastname: Maier
authors.forename: Chao-Yang
authors.initials: CY
authors.lastname: Lu
authors.forename: Jian-Wei
authors.initials: JW
authors.lastname: Pan
authors.forename: Niels
authors.initials: N
authors.lastname: Gregersen
authors.forename: Martin
authors.initials: M
authors.lastname: Kamp
authors.forename: Christian
authors.initials: C
authors.lastname: Schneider
authors.forename: Sven
authors.initials: S
authors.lastname: Höfling