Photons have been a flagship system for studying quantum mechanics, advancing quantum
information science, and developing quantum technologies. Quantum entanglement …

Entangled photon sources are desirable and key elements for photonic quantum information
processing. The spontaneous parametric down‐conversion (SPDC) process is a convenient …

We review the rapid recent progress in single-photon sources based on multiplexing
multiple probabilistic photon-creation events. Such multiplexing allows higher single-photon …

So far, nanostructuring of hard optical crystals has been exclusively limited to their surface,
as stress-induced crack formation and propagation render high-precision volume processes …

Nonlinear fiber optics concerns with the nonlinear optical phenomena occurring inside
optical fibers. Although the field ofnonlinear optics traces its beginning to 1961, when a ruby …

Semiconductor quantum dots in cavities are promising single-photon sources. Here, we
present a path to deterministic operation, by harnessing the intrinsic linear dipole in a …

Deterministic generation of single-and multiphoton states is a key requirement for large-
scale optical quantum information and communication applications. While heralded single …

The ability to process optical signals without passing into the electrical domain has always
attracted the attention of the research community. Processing photons by photons unfolds …

Quantum technology is poised to enable a step change in human capability for computing,
communications and sensing. Photons are indispensable as carriers of quantum information …

Parametric single-photon sources are well suited for large-scale quantum networks due to
their potential for photonic integration. Active multiplexing of photons can overcome the …