Assisted by the rapid development of photonic integrated circuits, scalable and versatile chip-
based quantum light sources with nonlinear optics are increasingly tangible for real-world …

Due to its properties, lithium niobate is one of the most suitable material platforms for the
implementation of integrated optical quantum circuits. With the commercialization of lithium …

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

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 …

Counter-propagating parametric conversion processes in non-linear bulk crystals have been
shown to feature unique properties for efficient narrowband frequency conversion. In …

Quantum entanglement is an integral part of quantum optics and has been exploited in
areas such as computation, cryptography and metrology. The entanglement between …

We analyze nonlinear optics schemes for generating pairs of quantum entangled plasmons
in the terahertz-infrared range in graphene. We predict that high plasmonic field …

Traditional quantum ghost imaging technique uses three-photon spontaneous parametric
down-conversion for producing beams of entangled photons. Two main factors limiting the …

Lithium niobate is a material that exhibits outstanding electro-optic, nonlinear optical,
acousto-optic, piezoelectric, photorefractive, and pyroelectric properties. A thin-film lithium …

We propose a scheme for the generation of counterpropagating polarization-entangled
photon pairs from a periodically poled lithium niobate on insulator waveguide. The …