Photon orbital angular momentum: generation, measurement and application to QKD

M. J. Padgett; D. Giovannini; M. Lavery; J. Romero; S. M. Barnett; F. Miatto; R. W. Boyd; J. Leach

doi:10.1117/12.975993

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19 November 2012 Photon orbital angular momentum: generation, measurement and application to QKD

M. J. Padgett, D. Giovannini, M. Lavery, J. Romero, S. M. Barnett, F. Miatto, R. W. Boyd, J. Leach

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Proceedings Volume 8542, Electro-Optical Remote Sensing, Photonic Technologies, and Applications VI; 85421P (2012) https://doi.org/10.1117/12.975993
Event: SPIE Security + Defence, 2012, Edinburgh, United Kingdom

Abstract

The information carried by a photon can be encoded in one or more of many different degrees of freedom. Beyond the two-dimensional space of polarisation (spin angular momentum) our interest lies in the unbounded yet discrete state space of Orbital Angular Momentum (OAM). We examine how photon pairs can be generated and measured over a large range of OAM states.

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M. J. Padgett, D. Giovannini, M. Lavery, J. Romero, S. M. Barnett, F. Miatto, R. W. Boyd, and J. Leach "Photon orbital angular momentum: generation, measurement and application to QKD", Proc. SPIE 8542, Electro-Optical Remote Sensing, Photonic Technologies, and Applications VI, 85421P (19 November 2012); https://doi.org/10.1117/12.975993

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