Open AccessCompact quasi-optical mode converter based on anisotropic metasurfaces
Author(s) -
Wenjie Fu,
Shijie Hu,
Chaoyang Zhang,
Xiaotong Guan,
Yan Yang
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.426525
Subject(s) - optics , physics , gaussian beam , terahertz radiation , mode scrambler , polarization (electrochemistry) , bandwidth (computing) , circular polarization , anisotropy , radiation mode , optoelectronics , beam (structure) , single mode optical fiber , optical fiber , telecommunications , microstrip , computer science , chemistry
In this paper, a novel compact quasi-optical mode converter based on anisotropic metasurfaces for high-order mode terahertz electronic devices is presented. To demonstrate the design model, a Ka-band metasurface quasi-optical mode converter that converts cylindrical waveguide TE 01 mode to circularly polarized Gaussian beam is designed and fabricated. Both electromagnetic simulation and experiment results show that the Gaussian beam can be observed from 35 to 38 GHz, corresponding to over 8.5% of the bandwidth. The maximum scalar Gaussian mode content of 97.85% is observed in the experiment, and the output radiation from the metasurface quasi-optical mode converter is approximate circular polarization. This work unveils the potential of compact quasi-optical mode converter based on metasurfaces.