Increased polarization-entangled photon flux via thinner crystals
P. S. K. Lee, Martin P. Van Exter, J. P. Woerdman · Physical Review A · 2004
We analyze the scaling laws that govern the production of polarization-entangled photons via type-II spontaneous parametric down-conversion (SPDC). We demonstrate experimentally that thin nonlinear crystals can generate a higher number of entangled photons than thicker crystals, basically because they generate a broader spectrum.