Orbital angular momentum of entangled counterpropagating photons
Juan P. Torres, Clara I. Osorio, Lluís Torner
We elucidate the paraxial orbital angular momentum of entangled photon pairs generated by spontaneous parametric downconversion in different noncollinear geometries in which the entangled photons counterpropagate. We find, in particular, the orbital angular momentum of entangled pairs generated in transverse-emitting configurations, in which none of the known rules for selecting orbital angular momentum holds.
Optics Letters•Aug 13, 2004•39 citations