Since its discovery, quantum entanglement has challenged some of the best established
views of the world: locality and reality. Quantum technologies promise to revolutionize …

Twisted photons can be used as alphabets to encode information beyond one bit per single
photon. This ability offers great potential for quantum information tasks, as well as for the …

The production of pairs of entangled photons simply by focusing a laser beam onto a crystal
with a nonlinear optical response was used to test quantum mechanics and to open new …

Metasurfaces consisting of engineered dielectric or metallic structures provide unique
solutions to realize exotic phenomena including negative refraction, achromatic focusing …

Transverse spatial modes of light offer a large state-space with interesting physical
properties. For exploiting these special modes in future long-distance experiments, the …

Spatial modes of light can potentially carry a vast amount of information, making them
promising candidates for both classical and quantum communication. However, the …

By solving the Maxwell's equations in Fourier space, we find that the cross-polarized
component of the dipole scattering field can be written as the second-order spatial …

Quantum metrology provides a route to overcome practical limits in sensing devices. It holds
particular relevance to biology, where sensitivity and resolution constraints restrict …

Low-light-level imaging techniques have application in many diverse fields, ranging from
biological sciences to security. A high-quality digital camera based on a multi-megapixel …

Photons with a twisted phase front carry a quantized amount of orbital angular momentum
(OAM) and have become important in various fields of optics, such as quantum and classical …