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
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.
|Glasgow Author(s):||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|