Refractive elements for the measurement of the orbital angular momentum of a single photon

Lavery, M.P.J., Robertson, D.J., Berkhout, G.C.G., Love, G.D., Padgett, M.J. and Courtial, J. (2012) Refractive elements for the measurement of the orbital angular momentum of a single photon. Optics Express, 20(3), pp. 2110-2115. (doi:10.1364/OE.20.002110)

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Publisher's URL: http://dx.doi.org/10.1364/OE.20.002110

Abstract

We have developed a mode transformer comprising two custom refractive optical elements which convert orbital angular momentum states into transverse momentum states. This transformation allows for an efficient measurement of the orbital angular momentum content of an input light beam. We characterise the channel capacity of the system for 50 input modes, giving a maximum value of 3.46 bits per photon. Using an electron multiplying CCD (EMCCD) camera with a laser source attenuated such that on average there is less than one photon present within the system per measurement period, we demonstrate that the elements are efficient for the use in single photon experiments.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Lavery, Dr Martin and Padgett, Professor Miles and Courtial, Dr Johannes
Authors: Lavery, M.P.J., Robertson, D.J., Berkhout, G.C.G., Love, G.D., Padgett, M.J., and Courtial, J.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Optics Express
Publisher:Optical Society of America
ISSN:1094-4087
ISSN (Online):1094-4087
Published Online:17 January 2012
Copyright Holders:Copyright © 2012 The Optical Society of America
First Published:First published in Optics Express 20(3):2110-2115
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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