Among the most prominent effects resulting from nonlinear light–matter interaction is the
generation of correlated and entangled photons through various processes, notably via …

The rapid development of optical metasurfaces, 2D ensembles of engineered
nanostructures, is presently underpinning a steady drive toward the miniaturization of many …

Here we present a roadmap on Photonic metasurfaces. This document consists of a number
of perspective articles on different applications, challenge areas or technologies underlying …

Quantum light sources are essential building blocks for many quantum technologies,
enabling secure communication, powerful computing, and precise sensing and imaging …

Generation of entangled photons through spontaneous parametric down-conversion
(SPDC) from micro-and nanoscale sources offers unprecedented freedom in quantum state …

The generation of photon pairs from nanoscale structures with high rates is still a challenge
for the integration of quantum devices, as it suffers from parasitic signals from the substrate …

Nonlinear metasurfaces have recently been established as a new platform for generating
photon pairs via spontaneous parametric down-conversion. While for classical harmonic …

The tuning of second (SHG) and third (THG) harmonic emission is studied in the model
system LiNb 1− x Ta x O 3 (0≤ x≤ 1, LNT) between the established edge compositions …

The high-quality factor resonant metasurfaces have extensive applications in enhancing
nonlinear frequency conversion efficiency at the subwavelength scale. However, methods …

Quantum metaphotonics has emerged as a cutting-edge subfield of meta-optics employing
subwavelength resonators and their planar structures, such as metasurfaces, to generate …