Questions tagged [spdc]
For questions related to spontaneous parametric down conversion. SPDC, parametric fluorescence or parametric scattering is a nonlinear instant optical process that converts one photon of higher energy (namely, a pump photon), into a pair of photons (namely, a signal photon, and an idler photon) of lower energy, in accordance with the law of conservation of energy and law of conservation of momentum. (Wikipedia)