Resonant sum frequency generation with time-energy entangled photons

Phys Rev Lett. 2009 Feb 6;102(5):053602. doi: 10.1103/PhysRevLett.102.053602. Epub 2009 Feb 6.

Abstract

We describe a technique for enhancing the efficiency of sum frequency generation using entangled signal and idler photons. By resonating the sum frequency field, we observe that the generated power varies linearly with input power and is increased by a factor of 12.