Explorable

Tilt the crystal, move the cones

Tilt a BBO crystal by a degree or two and watch the two polarized cones of down-converted light separate, touch and cross, computed from real phase matching.

3D VIEW · DRAG TO ROTATE · ANGLES DRAWN 4× LARGER THAN REAL · COMPUTED: calc/phase-matching.ts

Setup

405 → 810 nm351 → 702 nm (1995)

Crystal tilt+1.23°

Zero is the angle at which the two cones just touch along the laser beam.

CONEScrossing

PUMP–AXIS ANGLE42.36 °

CONE HALF-ANGLE4.5 °

CROSSINGS APART6.0 °

The physics, the assumptions behind this tool and the sources are explained in How entanglement is actually made.

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