At the core of quantum photonic information processing and sensing, two major building
pillars are single-photon emitters and single-photon detectors. In this review, we …

Integrated photonics will play a key role in quantum systems as they grow from few-qubit
prototypes to tens of thousands of qubits. The underlying optical quantum technologies can …

Two decades after their demonstration, superconducting nanowire single-photon detectors
(SNSPDs) have become indispensable tools for quantum photonics as well as for many …

Quantum key distribution—exchanging a random secret key relying on a quantum
mechanical resource—is the core feature of secure quantum networks. Entanglement-based …

A broad range of scientific and industrial disciplines require precise optical measurements at
very low light levels. Single-photon detectors combining high efficiency and high time …

Hybrid integration provides an important avenue for incorporating atom‐like solid‐state
single‐photon emitters into photonic platforms that possess no optically‐active transitions …

Quantum physics phenomena, entanglement and coherence, are crucial for quantum
information protocols, but understanding these in systems with more than two parts is …

The requirements in quantum optics experiments for high single-photon detection efficiency,
low timing jitter, low dark count rate and short dead time have been fulfilled with the …

The realization of large-scale photonic circuits for quantum optics experiments at telecom
wavelengths requires an increasing number of integrated detectors. Superconducting …

Integration of superconducting devices on photonic platforms opens up a wide range of
functionalities and applications. We report on NbTiN thin films deposited on SiO 2, Si 3 N 4 …