Journal ArticleDOI
Terahertz device utilizing a transmissive geometric metasurface.
Qiusheng Li,Yi Chen +1 more
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TLDR
In this paper , a scheme is proposed to generate two/four splitting vortex beams and focusing vortex beams with different topological charges under left circularly polarized and right circularly polarised terahertz waves under incidence.Abstract:
Due to potential applications in next generation high-capacity wireless communication systems, generating and controlling vortex beams carrying orbital angular momentum (OAM) has received considerable attention. In this work, a scheme is proposed to generate two/four splitting vortex beams and focusing vortex beams with different topological charges under left circularly polarized and right circularly polarized terahertz waves under incidence. The meta-unit cell consists of a two-flying-fish-shaped patterned metallic top layer and an identical metallic patterned bottom layer separated by a silica layer. Full-wave simulation results agree well with that of calculation predictions. The proposed terahertz metasurface-based devices are able to carry different OAM modes and can abruptly manipulate during propagation, which indicates that such metasurface-based devices may have promising applications in terahertz wireless communication links in the future.read more
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Terahertz anisotropic coding metasurface based on vanadium dioxide
TL;DR: In this article , a vanadium dioxide (VO2)-based metamaterial with anisotropic characteristics is designed for the terahertz frequency band, which is composed of three layers, with a metalcross structure embedded in VO2 at the top, polyimide in the middle, and pure metal at the bottom.
References
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Journal ArticleDOI
Optical communications using orbital angular momentum beams
Alan E. Willner,Hao Huang,Yan Yan,Yongxiong Ren,Nisar Ahmed,Guodong Xie,Changjing Bao,Long Li,Yinwen Cao,Zhe Zhao,Jian Wang,Martin P. J. Lavery,Moshe Tur,Siddharth Ramachandran,Andreas F. Molisch,Nima Ashrafi,Solyman Ashrafi +16 more
TL;DR: In this article, the authors review recent progress in OAM beam generation/detection, multiplexing/demultiplexing, and its potential applications in different scenarios including free-space optical communications, fiber-optic communications, and RF communications.
Journal ArticleDOI
A Survey on OFDM-Based Elastic Core Optical Networking
TL;DR: A novel elastic optical network architecture with immense flexibility and scalability in spectrum allocation and data rate accommodation could be built to support diverse services and the rapid growth of Internet traffic in the future.
Journal ArticleDOI
Design, fabrication, and measurement of reflective metasurface for orbital angular momentum vortex wave in radio frequency domain
TL;DR: In this paper, a reflective metasurface is designed, fabricated, and experimentally demonstrated to generate an orbital angular angular momentum (OAM) vortexwave in radio frequency domain.
Journal ArticleDOI
Broadband high-efficiency cross-polarization conversion and multi-functional wavefront manipulation based on chiral structure metasurface for terahertz wave
Junpeng Fan,Yongzhi Cheng +1 more
Journal ArticleDOI
Characterization of an OAM Flat-Plate Antenna in the Millimeter Frequency Band
TL;DR: In this article, a new type of antenna in the millimeter frequency band is characterized in an anechoic chamber, where the index-varying flat plate generates an electromagnetic wave carrying orbital angular momentum.