Modern imaging technologies are widely based on classical principles of light or
electromagnetic wave propagation. They can be remarkably sophisticated, with recent …

Two processes of photon-pair creation can be arranged such that the paths of the emitted
photons are identical. The path information is thereby not erased but rather never born in the …

Structured light has become topical of late, where controlling light in all its degrees of
freedom has offered novel states of light long predicted, enhanced functionality in …

Entanglement is a quintessential quantum mechanical phenomenon with no classical
equivalent. First discussed by Einstein, Podolsky, and Rosen and formally introduced by …

We present a tutorial on the phenomenon of induced coherence without induced emission,
and specifically its application to imaging and metrology. It is based on a striking effect …

Imaging with undetected photons relies upon nonlinear interferometry to extract the spatial
image from an infrared probe beam and reveal it in the interference pattern of an easier-to …

Imaging based on the induced coherence effect makes use of photon pairs to obtain
information of an object without detecting the light that probes it. While one photon …

Quantum illumination has been proposed and demonstrated to improve the signal-to-noise
ratio (SNR) in light detection and ranging (LiDAR). When relying on coincidence detection …

Quantum imaging with undetected light (QIUL) leverages the quantum correlations of photon
pairs generated via spontaneous parametric down-conversion (SPDC) to retrieve both …

Optical nonlinear conversion processes are ubiquitously applied to scientific as well as
industrial tasks. In particular, nonlinear processes are employed to generate radiation in …