Entangled photon states are a fundamental resource for optical quantum technologies and
investigating the fundamental predictions of quantum mechanics. Up to now such states are …

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

Non-orthogonal eigenstates are a fundamental feature of non-Hermitian systems and are
accompanied by the emergence of nontrivial features. However, the platforms to explore non …

We present a theoretical study of circular dichroism in the second-harmonic signal of single
dielectric nanostructures with different symmetries and noncentrosymmetric materials. We …

This chapter reviews the physics and applications of nonlinear processes in resonant
dielectric nanostructures. The focus is placed on the nonlinear phenomena stemming from …

Gallium phosphide (GaP) offers unique opportunities for nonlinear and quantum
nanophotonics due to its wide optical transparency range, high second-order nonlinear …

The ability to engineer pairs of entangled photons is essential to quantum information
science, and generating these states using spontaneous parametric down-conversion …

Two-dimensional arrays of nanoresonators, known as metasurfaces, particularly those
fabricated from materials with non-zero second-order nonlinear susceptibility χ (2) represent …