Multipolar expansion of orbital angular momentum modes

Details Multipolar expansion of orbital angular momentum modes Multipolar expansion of orbital angular momentum modes

2008-04-09

arxiv.org/abs/0804.1494v1

Physics

Optics

Scientific paper

In this letter a general method for expanding paraxial beams into multipolar electromagnetic fields is presented. This method is applied to the expansion of paraxial modes with orbital angular momentum (OAM), showing how the paraxial OAM is related to the general angular momentum of an electromagnetic wave. This method can be extended to quasi-paraxial beams, i.e. highly focused laser beams. Some applications to the control of electronic transitions in atoms are discussed.

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