Simultaneous and independent regulation of circularly polarized terahertz wave based on metasurface

A single metasurface-based device possessing multiple functionalities is highly desirable for terahertz technology system. In this paper, we design a reflective metasurface to generate switchable vortex beams carrying orbital angular momentum (OAM), focusing beams, focusing beams with arbitrary posi...

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Bibliographic Details
Published in:Optics express 2022-06, Vol.30 (12), p.20298-20310
Main Authors: Li, Jiu-Sheng, Chen, Jun-Zhao
Format: Article
Language:English
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Summary:A single metasurface-based device possessing multiple functionalities is highly desirable for terahertz technology system. In this paper, we design a reflective metasurface to generate switchable vortex beams carrying orbital angular momentum (OAM), focusing beams, focusing beams with arbitrary positions, and vortex beams with arbitrary topological charges in the terahertz region. By combining the spin decoupling principle and the phase addition theorem, the superposition states of OAM and focusing beams with arbitrary positions can be independent manipulated under right-handed and left-handed circularly polarized (LCP/RCP) waves illumination. Such a diversified functionalities device provides a promising application in the field of terahertz communication and terahertz super-resolution imaging.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.458810