Abstract
Recently, terahertz (THz) wireless communication has been widely investigated as the future prospect of wireless network architecture. However, most of the natural existing materials are inapplicable for THz devices, which hinder their further development. To promote the integration and channel capacity of the THz wireless communication systems, an ultrabroadband polarization conversion metasurface for efficient multi-functional wavefront manipulation is proposed. The designed metasurface is composed of an arrow-type structure sandwiched by a pair of orthogonal gratings, which can induce the Fabry-Pérot-like cavity for improving the transmission. Simulated results indicate that the transmission coefficient of the cross-polarization metasurface is higher than 90% from 0.73 THz to 2.24 THz, and the corresponding polarization conversion ratio is greater than 99.5%. Moreover, the phase coverage of 0–2π at operation frequency can be easily obtained by altering the geometric parameter of the metasurface. To demonstrate the concept of wavefront manipulation, anomalous refraction, focusing metalens, and vortex beam generation are investigated in detail. All of these applications exhibit a remarkable performance of the proposed metasurface that has great potential in prompting the efficient, broadband and compact systems for THz wireless communication.
Highlights
The desired manipulation of the electromagnetic (EM) wave, which exhibits a magnificent prospect for next-generation applications, has gradually consolidated its position as motivating research in past years [1,2,3]
The transmission coefficient of the polarization conversion metasurface is higher than 90% from 0.73 THz to
The results indicate that the simulations agree well agree well with the theoretical predictions, implying that the designed metasurface can with the theoretical predictions, implying that the designed metasurface can function as a function as a broadband anomalous refractor with excellent performance
Summary
The desired manipulation of the electromagnetic (EM) wave, which exhibits a magnificent prospect for next-generation applications, has gradually consolidated its position as motivating research in past years [1,2,3]. The ultra-broadband polarization conversion metasurface can realize multi-functional wavefront manipulation with remarkable performance in the THz range. The arrow‐type metallic structure in the middle layer is expected to realize high transmission of polarization conversion and 2π phase delay. The electric dipole is excited from the middle layer, the proposed metasurface can be divided into three functional parts: top (perpendicular as depicted in the insertion of Figure 2b, which can be coupled into a certain component to incident waves), middle and bottom (parallel to The the incident of the incident waves to realize the(arrow-type conversionstructure) of linear cross‐polarization [35]. The electric dipole is excited from the middle layer, as depicted in the insertion of Figure 2b, which can be coupled into a certain component of incident waves to realize the conversion of linear cross-polarization [35].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
