Abstract
The quantum mechanical description of parametric fluorescence is the splitting of a single photon into two photons. This description has been verified by observing coincidences between photons emitted by an ammonium dihydrogen phosphate crystal pumped by a 325-nm He-Cd laser. The coincidence rate decreases to the calculated accidental rate [], unless the two detectors are arranged to satisfy energy and momentum conservation and have equal time delays.
- Received 12 May 1970
DOI:https://doi.org/10.1103/PhysRevLett.25.84
©1970 American Physical Society