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Orbital Angular Momentum Generation Using a Circular Wire Loop Antenna

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Abstract

A circular wire loop antenna with the phase distribution along the circle of exp(−jlϕ) is demonstrated to generate the orbital angular momentum (OAM). Theoretical formulation of the electromagnetic field is deduced and used to calculate the angular momentum mode including the OAM mode and the spin angular momentum (SAM) mode for these electromagnetic waves. The evolution and distribution of the OAM mode and SAM mode during the transmission is also proposed. The calculated results verify the feasibility of generation the OAM-carrying waves by the circular wire loop antenna.

© 2014 Optical Society of America

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