Inbar Hurvitz

We present direct single-pass generation of polarization-entangled photon pairs near 810 nm in a domain-engineered nonlinear crystal pumped by a continuous-wave 405 nm laser. Despite operating outside the natural group-velocity matching regime, the source produces high-quality polarization entanglement with a Clauser–Horne–Shimony–Holt parameter of $S = 2.764\pm 0.002$.