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최은미

Choi, EunMi
THz Vacuum Electronics and Applied Electromagnetics Lab.
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E‐Band Metasurface‐Based Orbital Angular Momentum Multiplexing and Demultiplexing

Author(s)
Chung, HyeongjuKim, DaeikChoi, EunMiLee, Jongwon
Issued Date
2022-06
DOI
10.1002/lpor.202100456
URI
https://scholarworks.unist.ac.kr/handle/201301/57654
Fulltext
https://onlinelibrary.wiley.com/doi/10.1002/lpor.202100456
Citation
LASER & PHOTONICS REVIEWS, v.16, no.6, pp.2100456
Abstract
Orbital angular momentum (OAM) has received considerable attention regarding high-capacity communication owing to its spatial orthogonality. However, it is still challenging to build a compact communication system that can generate multiple coaxial OAM beams and receive information from each. In this work, OAM multiplexing and demultiplexing at the E-band frequency using a single metasurface structure is proposed and experimentally demonstrated. For OAM multiplexing, the metasurface used as a transceiver generates two orthogonal coaxial OAM beams for Gaussian incident beams with different incidence angles. For OAM demultiplexing, the same metasurface flipped 180° as a receiver forms a Gaussian beam in different off-axis directions depending on the topological charge of the coaxially incident OAM beam. The Gaussian beam measured at the receiver end exhibits a high signal-to-noise ratio of more than 33 dB compared with the background OAM beam. OAM multiplexing and demultiplexing based on a single metasurface may provide a route for high-capacity and compact free-space communication systems.
Publisher
Wiley - VCH Verlag GmbH & CO. KGaA
ISSN
1863-8880
Keyword (Author)
demultiplexingE-bandfree-space communicationmetasurfacesmultiplexingorbital angular momentum
Keyword
BROAD-BANDWAVE PLATETRANSMISSIONEFFICIENCYLIGHT

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