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Orbital angular momentum and nonparaxial light beams |
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| Authors: | Stephen M Barnett L Allen |
| Institution: | a Department of Physics and Applied Physics, University of Strathclyde, Glasgow G4 0NG, UK b Department of Physics, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK |
| Abstract: | The simple relationship between total angular momentum and energy and the seemingly natural separation of the angular momentum into spin and orbital components in the paraxial approximation, are investigated for a general nonparaxial form of monochromatic beam with near cylindrical symmetry. |
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