Entangled-photon generation from parametric down-conversion in media with inhomogeneous nonlinearity
Entangled-photon generation from parametric down-conversion in media with inhomogeneous nonlinearity
We develop and experimentally verify a theory of type II spontaneous parametric down-conversion (SPDC) in media with inhomogeneous distributions of second-order nonlinearity. As a special case, we explore interference effects from SPDC generated in a cascade of two bulk crystals separated by an air gap. The polarization quantum-interference pattern is …