Deterministic qubit transfer between orbital and spin angular momentum   of single photons
  In this work we experimentally implement a deterministic transfer of a generic qubit initially encoded in the orbital angular momentum of a single photon to its polarization. Such transfer of quantum information, completely reversible, has been implemented adopting a electrically tunable q-plate device and a Sagnac interferomenter with a Dove's prism. The adopted scheme exhibits a high fidelity and low losses. 
Vincenzo D'Ambrosio, Eleonora Nagali, Carlos H. Monken, Sergei   Slussarenko, Lorenzo Marrucci, and Fabio Sciarrino
quant-ph physics.optics