Broadband terahertz transmissive quarter-wave metasurface

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dc.contributor.authorYou, X.
dc.contributor.authorAko, R.T.
dc.contributor.authorLee, W.S.L.
dc.contributor.authorBhaskaran, M.
dc.contributor.authorSriram, S.
dc.contributor.authorFumeaux, C.
dc.contributor.authorWithayachumnankul, W.
dc.date.issued2020
dc.description.abstractPolarization conversion devices are key components in spectroscopy and wireless communications systems. Conventional terahertz waveplates made of natural birefringent materials typically suffer from low efficiency, narrow bandwidth, and substantial thickness. To overcome the limitations associated with conventional waveplates, a terahertz quarter-wave metasurface with enhanced efficiency and wide bandwidth is proposed. The transmissive quarter-wave metasurface is rigorously designed based on an extended semi-analytical approach employing network analysis and genetic algorithm. Simulation results suggest that the design can achieve linear-to-circular polarization conversion with a 3-dB axial ratio relative bandwidth of 53.3%, spanning 205 GHz–354 GHz. The measurement results confirm that the proposed design enables a 3-dB axial ratio from 205 GHz to at least 340 GHz with a total efficiency beyond 70.2%, where the upper frequency bound is limited by the available experimental facility. This quarter-wave metasurface can cover an entire terahertz electronics band and can be scaled to cover other nearby bands under the same convention, which are technologically significant for future portable systems.
dc.description.statementofresponsibilityXiaolong You, Rajour T. Ako, Wendy S. L. Lee, Madhu Bhaskaran, Sharath Sriram, Christophe Fumeaux and Withawat Withayachumnankul
dc.identifier.citationAPL Photonics, 2020; 5(9):096108-1-096108-9
dc.identifier.doi10.1063/5.0017830
dc.identifier.issn2378-0967
dc.identifier.issn2378-0967
dc.identifier.orcidYou, X. [0000-0003-4037-9556]
dc.identifier.orcidLee, W.S.L. [0000-0001-7760-6121]
dc.identifier.orcidFumeaux, C. [0000-0001-6831-7213]
dc.identifier.orcidWithayachumnankul, W. [0000-0003-1155-567X]
dc.identifier.urihttp://hdl.handle.net/2440/129323
dc.language.isoen
dc.publisherAIP Publishing
dc.relation.granthttp://purl.org/au-research/grants/arc/DP170101922
dc.relation.granthttp://purl.org/au-research/grants/arc/DP180103561
dc.rights© 2020 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). https://doi.org/10.1063/5.0017830
dc.source.urihttps://doi.org/10.1063/5.0017830
dc.titleBroadband terahertz transmissive quarter-wave metasurface
dc.typeJournal article
pubs.publication-statusPublished

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