Waveguide superconducting single-photon detectors for integrated quantum photonic circuits

Waveguide integrated superconducting single-photon detectors with high internal quantum efficiency at telecom wavelengths

Superconducting nanowire single-photon detectors (SNSPDs) provide high efficiency for detecting individual photons while keeping dark counts and timing jitter minimal. Besides superior detection performance over a broad optical bandwidth, compatibility with an integrated optical platform is a crucial requirement for applications in emerging quantum photonic technologies. Here we present SNSPDs ...

Modelling superconducting nanowire single photon detectors in a waveguide cavity.

In this work we report on a single photon detector system which offers near-unity detection efficiency using waveguide-coupled superconducting nanowires with lengths on the order of 1 μm. This is achieved by embedding the nanowires in a racetrack resonator where the interaction time with the photons trapped in the cavity is increased, thereby allowing for shorter nanowires. We expect this to le...

A carrier relaxation bottleneck probed in single InGaAs quantum dots using integrated superconducting single photon detectors

Aspheric waveguide lenses for photonic integrated circuits

Indium phosphide is one of the most promising materials for photonic integrated circuits that combine passive optical components such as waveguides, couplers, and filters with active components such as lasers, detectors, and modulators all on the same chip. A waveguide lens is a very useful component for integrated optics and substantial work has indeed been devoted to its achievement. Many len...

Superconducting nanowire single-photon detectors integrated with optical nano-antennae.

Optical nano-antennae have been integrated with semiconductor lasers to intensify light at the nanoscale and photodiodes to enhance photocurrent. In quantum optics, plasmonic metal structures have been used to enhance nonclassical light emission from single quantum dots. Absorption and detection of single photons from free space could also be enhanced by nanometallic antennae, but this has not ...