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Phys. Rev. Lett. 92, 013601 (2004) [4 pages]

Interferometric Methods to Measure Orbital and Spin, or the Total Angular Momentum of a Single Photon

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Jonathan Leach1, Johannes Courtial1, Kenneth Skeldon1, Stephen M. Barnett2, Sonja Franke-Arnold2, and Miles J. Padgett1,*
1Department of Physics and Astronomy, University of Glasgow, Glasgow, Scotland
2Department of Physics, University of Strathclyde, Glasgow, Scotland

Received 8 July 2003; revised 10 October 2003; published 5 January 2004

We propose interferometric methods capable of measuring either the total angular momentum, or simultaneously measuring the spin and orbital angular momentum of single photons. This development enables the measurement of any angular momentum eigenstate of a single photon. The work allows the investigation of single-photon two-qubit entangled states and has implications for high density information transfer.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.013601
DOI:
10.1103/PhysRevLett.92.013601
PACS:
42.50.Ar, 03.67.Mn

*Electronic address: m.padgett@physics.gla.ac.uk

 
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