WCSE

The Orbital Angular Momentum Modes of the Bessel Vortex Beam are Modulated by Using The Metasurface

Abstract— The orbital angular momentum associated with the helical phase wavefront of electromagnetic waves has orthogonal infinite spatial modes in theory, and the channel capacity is greatly increased by spatial mode multiplexing. Among the different methods for generating and manipulating the orbital angular momentum state of light, using a metasurface to produce more modes coupling between spin and orbital angular momentum allows faster manipulation of the orbital angular momentum state, which is simpler and faster than manipulating conventional orbital angular momentum generators. In this work, the orbital angular momentum carried by the Bessel vortex beam changes from +3 to −1 by using the metasurface, while +1remains +1. It is found that the interaction between the metasurface and the vortex beam is not only related to the specific geometry of the metasurface, but also to the OAM state of the beam. The numerical results agree well with the theoretical results. This paper provides a theoretical basis for studying the orbital angular momentum carried by light beams in optical communication and information processing.

Index Terms— modulate, orbital angular momentum, Bessel vortex beam, metasurface.

Zhong Yu
School of Information and Communication Engineering, Xi’an University of Posts & Telecommunications
Zhijia Ding
School of Information and Communication Engineering, Xi’an University of Posts & Telecommunications
Bingwen He
School of Information and Communication Engineering, Xi’an University of Posts & Telecommunications
Pan Wang
School of Information and Communication Engineering, Xi’an University of Posts & Telecommunications

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Cite: Zhong Yu, Zhijia Ding, Bingwen He, Pan Wang, "The Orbital Angular Momentum Modes of the Bessel Vortex Beam are Modulated by Using The Metasurface," WCSE 2022 Spring Event: 2022 9th International Conference on Industrial Engineering and Applications, pp. 151-157, Sanya, China, April 15-18, 2022.