Abstract
Recent advances in electromagnetic (EM) waves with helical phase wave-front carrying orbital angular momentum (OAM) has drawn great attention, since it is believed to be a promising candidate for the next generation of wireless communication technology. To make the design more practical, here, a transmissive metasurface for generating dual-mode and dual-polarization OAM has been designed, manufactured and experimentally validated. To generate EM waves carrying OAM, the element structure is well-designed and can introduce additional phase to the incident wave. The employed four-layer cascaded metasurface demonstrates a high performance of transmission and complete phase control. Dual-mode operating characterization is realized by applying the polarization-dependent physical response. Moreover, experimental results including near-field and far-field properties are conducted to validate the numerical simulations. The proposed method in this paper promotes the practical design and realization of OAM vortex waves for the next generation of wireless communication technology.
Highlights
Recent advances in electromagnetic (EM) waves with helical phase wave-front carrying orbital angular momentum (OAM) has drawn great attention, since it is believed to be a promising candidate for the generation of wireless communication technology
Metasurface, as a powerful solution to manipulate the wave front of reflected or transmitted EM waves, has been studied and designed to control EM phase to generate vortex waves carrying OAM, characteristics of easy fabrication and free of complicated feeding systems are promising for their practical engineering applications, most of the reported work are based on the reflective metasurfaces and not compact enough due to the existing of air layer[27,28,29,30,31,32]
Due to the orthogonal property of x- and y-polarizations, a high isolation can be achieved between different OAM modes, which is more advantageous than the reported work[30]
Summary
Recent advances in electromagnetic (EM) waves with helical phase wave-front carrying orbital angular momentum (OAM) has drawn great attention, since it is believed to be a promising candidate for the generation of wireless communication technology. A transmissive metasurface is designed, manufactured and experimentally validated to generate dual-mode dual-polarization OAM vortex waves simultaneously.
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