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. 2002 Jun 24;88(25 Pt 1):257901.
doi: 10.1103/PhysRevLett.88.257901. Epub 2002 Jun 5.

Measuring the orbital angular momentum of a single photon

Jonathan Leach  1 , Miles J Padgett, Stephen M Barnett, Sonja Franke-Arnold, Johannes Courtial
Affiliations

Measuring the orbital angular momentum of a single photon

Jonathan Leach et al. Phys Rev Lett. .

Abstract

We propose an interferometric method for measuring the orbital angular momentum of single photons. We demonstrate its viability by sorting four different orbital angular momentum states, and are thus able to encode two bits of information on a single photon. This new approach has implications for entanglement experiments, quantum cryptography and high density information transfer.

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