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Limit to the orbital angular momentum per unit energy in a light beam that can be focused onto a small particle

Courtial, J., and Padgett, M. (2000) Limit to the orbital angular momentum per unit energy in a light beam that can be focused onto a small particle. Optics Communications, 173 (1-6). 269 -274. ISSN 0030-4018 (doi:10.1016/S0030-4018(99)00619-7)

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Publisher's URL: http://dx.doi.org/10.1016/S0030-4018(99)00619-7

Abstract

Within a ray-optical approximation we show that there is a limit to the orbital angular momentum per unit energy that can be focused onto a small particle. This limit depends solely on the geometry of the focusing optics and the size of the particle and is independent of the wavelength of the light.

Item Type:Article
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Padgett, Prof Miles
Authors: Courtial, J., and Padgett, M.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Optics Communications
ISSN:0030-4018

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