We demonstrate the suppression and enhancement of the spontaneous emission of entangled photon pairs in parametric down-conversion using suitably placed external mirrors. The mirrors permit interference between two possible ways of creating the photon pair. In principle these mirrors can be placed at an arbitrarily large distance from the crystal. The effect is of first order in the intensity of the down-conversion radiation.
|Number of pages||4|
|Journal||Physical Review Letters|
|Publication status||Published - 31 Jan 1994|