Conversion of Poisson photons into sub-Poisson photons by the action of electron.

Poisson photons may be converted into sub-Poisson photons by the action of an electron current configured in an external feedback loop. The generation mechanism involves single-photon transitions so that the source can be made arbitrarily sub- Poisson. Unlike previous schemes, nonlinear optics is not invoked. A useful configuration involves a photon emitter illuminating a detector/source combination in a closed loop system.