Generation

of stationary correlated light sources such as thermal light, whereby photons propagate closer together than described by random Poissonian timing statistics.

e.g. laser diodes operating below the threshold current produce amplified spontaneous emission which exhibit the Hanbury-Brown and Twiss effect. Our result performs at a spectral density ten orders of magnitude brighter than most other quantum light sources such as spontaneous parametric down-conversion.

Detection

by coherence propagation of light in the far-field regime, to extract information beyond the classical limits in imaging and spectroscopy.

e.g. high spatial frequency filtering of light into radially symmetric and asymmetric modes by Mach-Zehnder interferometry with image inversion results in a separation of shot noise components which may increase the signal-to-noise ratio of certain measurements.

Application

for photonic sensing in uses cases such as quantum lidar that is resilient against spoofing attacks.