University of Copenhagen

Københavns Universitet

Peter Lodahl

Leonardo Midolo

Sahand Mahmoodian

Immo Nathanael Söllner

Søren Stobbe

Ravitej Uppu

Henri Thyrrestrup Nielsen

Chris Lennart Dreessen

Petru Tighineanu

Anders Søndberg Sørensen

Anders Søndberg SØRENSEN

This disclosure relates to an optical device comprising: a first filter waveguide section having an input for receiving a pump signal, the first filter waveguide section further having an output; an emitter waveguide section having an input coupled to the output of the first filter waveguide section to receive a transmitted pump signal therefrom, the emitter waveguide section supporting at least a first guided lower-order optical mode and a second guided higher-order optical mode, the emitter waveguide section comprising a photon emitter coupled to the first guided mode to emit radiation into the first guided mode and coupled to the second guided mode to allow optical pumping of the photon emitter by pump signal power carried in the second guided mode, the emitter waveguide section further having an output for outputting radiation emitted from the photon emitter; a second filter waveguide section having an input coupled to the output of the emitter waveguide section and having an output, the second filter waveguide section being configured to transmit radiation emitted into the first guided mode with lower loss than radiation emitted into modes other than the first guided mode; the first filter waveguide section being configured to couple pump signal power predominantly into the second guided mode of the emitter section.

Single-photon optical device

The invention relates to coherent single photon sources that provide photons with a high degree of indistinguishability. It is a disadvantage of single photon sources based on QDs in nanophotonic structures that, even at low temperatures, acoustic vibrations interact with the QDs to reduce the coherence of the emitted spectrum. The invention uses mechanical clamping of the nanostructure to damp vibrations leading to a weaker QD&#x2014;phonon coupling and a higher degree of indistinguishability between successively emitted photons. The clamp is mechanically connected to the length of the photonic nanostructure and has a stiffness and a size sufficient to suppress low frequency vibrations (&#x3c9;&#x2264;10 GHz) in a combined structure of the clamp and the nanostructure.

Coherent single photon source

An optical device comprising a planar waveguide and a quantum emitter is presented. The planar waveguide comprises a longitudinal extending guiding region with a first side and a second side. A first nanostructure is arranged on the first side of the guiding region, and a second nanostructure is arranged on the second side of the guiding region. The planar waveguide includes a first longitudinal region where the first nanostructure and the second nanostructure are arranged substantially glide-plane symmetric about the guiding region of the planar waveguide, and the quantum emitter is coupled to the first longitudinal region of the planar waveguide.

Efficient spin-photon interface using glide-plane-symmetric waveguide

An optical device comprising a single-photon device, which is coupled to a planar waveguide is described. The planar waveguide comprises a nanostructured section, which includes a longitudinal extending guiding region with a first side and a second side, a first nanostructure arranged on the first side of the guiding region, and a second nanostructure arranged on the second side of the guiding region. The nanostructured section comprises a slow-mode section, in which the single-photon device is positioned or embedded, and in which the first nanostructure and second nanostructure suppress spontaneous emission into other modes. The planar waveguide further comprises a fiber coupler for coupling light out of the planar waveguide and into an optical fiber, the fiber coupler preferably being adapted to match a field profile of an optical fiber.

Optical device having efficient light-matter interface for quantum simulations

Growing community of inventors

Birkerød, Denmark

Peter Lodahl