The orbital angular momentum carried by single photons represents a promising resource in the quantum information field. In this paper we report the characterization in the quantum regime of a recently introduced optical device, known as q-plate. Exploiting the spin-orbit coupling that takes place in the q-plate, it is possible to transfer coherently the information from the polarization to the orbital angular momentum degree of freedom, and viceversa. Hence the q-plate provides a reliable bi-directional interface between polarization and orbital angular momentum. As a first paradigmatic demonstration of the q-plate properties, we have carried out the first experimental Hong-Ou-mandel effect purely observed in the orbital angular momentum degree of freedom.
Quantum interference by coherence transfer from spin to orbital angular momentum of photons / E., Nagali; F., Sciarrino; L., Sansoni; F., De Martini; Marrucci, Lorenzo; Piccirillo, Bruno; Karimi, Ebrahim; Santamato, Enrico. - STAMPA. - 7355:(2009), pp. 735507-1-735507-10. [10.1117/12.821083]
Quantum interference by coherence transfer from spin to orbital angular momentum of photons
MARRUCCI, LORENZO;PICCIRILLO, BRUNO;KARIMI, ebrahim;SANTAMATO, ENRICO
2009
Abstract
The orbital angular momentum carried by single photons represents a promising resource in the quantum information field. In this paper we report the characterization in the quantum regime of a recently introduced optical device, known as q-plate. Exploiting the spin-orbit coupling that takes place in the q-plate, it is possible to transfer coherently the information from the polarization to the orbital angular momentum degree of freedom, and viceversa. Hence the q-plate provides a reliable bi-directional interface between polarization and orbital angular momentum. As a first paradigmatic demonstration of the q-plate properties, we have carried out the first experimental Hong-Ou-mandel effect purely observed in the orbital angular momentum degree of freedom.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.