Graphene-based metamaterial transmitarray antenna design for the generation of tunable orbital angular momentum vortex electromagnetic waves

A graphene-based metamaterial transmitarray antenna is proposed to generate tunable orbital angular momentum (OAM) vortex waves in terahertz. Theoretical design of the transmitarray antenna has been developed by using the transmission line network model, and a multilayer graphene-based metamaterial...

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Bibliographic Details
Published inOptical materials express Vol. 9; no. 9; p. 3709
Main Authors Meng, Zan Kui, Shi, Yan, Wei, Wen Yue, Zhang, Ying, Li, Long
Format Journal Article
LanguageEnglish
Published Washington Optical Society of America 01.09.2019
Subjects
Angular momentum
Antenna design
Antennas
Computer simulation
Electromagnetic radiation
Graphene
Metamaterials
Multilayers
Organic chemistry
Transmission lines
Vortices
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Summary:A graphene-based metamaterial transmitarray antenna is proposed to generate tunable orbital angular momentum (OAM) vortex waves in terahertz. Theoretical design of the transmitarray antenna has been developed by using the transmission line network model, and a multilayer graphene-based metamaterial element has been designed. By changing the chemical potentials of the graphene sheets, the 360° transmission phase range of the element is achieved in a broad band from 4.2 THz to 5.6 THz. By arranging the metamaterial element into a transmitarray, the OAM waves with tunable modes including l = 0, ±1, ±2 and the mode purity greater than 0.96 are generated. Simulation results are given to demonstrate good performance of the proposed design, which provides a feasible way to the efficient generation and manipulation of the OAM vortex waves in terahertz.
ISSN:2159-3930
2159-3930
DOI:10.1364/OME.9.003709