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dc.contributor.authorMa, Xinyu
dc.contributor.authorLi, Yanfeng
dc.contributor.authorLu, Yongchang
dc.contributor.authorHan, Jiaguang
dc.contributor.authorZhang, Xixiang
dc.contributor.authorZhang, Weili
dc.date.accessioned2020-10-15T13:19:14Z
dc.date.available2020-10-15T13:19:14Z
dc.date.issued2020-10-15
dc.date.submitted2020-07-07
dc.identifier.citationMa, X., Li, Y., Lu, Y., Han, J., Zhang, X., & Zhang, W. (2020). Metagrating-Based Terahertz Polarization Beam Splitter Designed by Simplified Modal Method. Frontiers in Physics, 8. doi:10.3389/fphy.2020.580781
dc.identifier.issn2296-424X
dc.identifier.doi10.3389/fphy.2020.580781
dc.identifier.urihttp://hdl.handle.net/10754/665601
dc.description.abstractTerahertz waves are finding important applications in diverse fields, and meanwhile the manipulation of terahertz waves calls for the development of various functional devices. Here, we have designed and fabricated a metagrating-based polarization beam splitter for terahertz waves using the simplified modal method. By only considering two propagation modes and treating the grating as a Mach-Zehnder interferometer, the method can greatly simplify the reverse grating design process. The parameters of the grating are first obtained under the guidance of the simplified modal method and then improved upon by the finite element method. The fabricated device is finally experimentally demonstrated with a terahertz time-domain spectroscopy system. The diffraction efficiencies of the polarization beam splitter at 0.9 THz are measured to be 69 and 63% for TE and TM waves relative to that of a silicon plate, respectively. The corresponding extinction ratios are 12 and 17 dB for TE and TM waves, respectively. The experiment results agree well with the simulations.
dc.description.sponsorshipThis work was supported by the National Key Research and Development Program of China (Grant No. 2017YFA0701004), the National Natural Science Foundation of China (Grant Nos. 61775159, 61420106006, 61427814, 61422509, 61735012, and 61505146), the Tianjin Municipal Fund for Distinguished Young Scholars (Grant No. 18JCJQJC45600), and King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) (Grant No. OSR-2016-CRG5-2950).
dc.description.sponsorshipThe authors are grateful to Fan Yang of Tsinghua University for valuable discussions.
dc.publisherFrontiers Media SA
dc.relation.urlhttps://www.frontiersin.org/article/10.3389/fphy.2020.580781/full
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleMetagrating-Based Terahertz Polarization Beam Splitter Designed by Simplified Modal Method
dc.typeArticle
dc.contributor.departmentPhysical Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia.
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalFrontiers in Physics
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionCenter for Terahertz Waves, Key Laboratory of Optoelectronic Information Technology (Ministry of Education), College of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, China.
dc.contributor.institutionSchool of Electrical and Computer Engineering, Oklahoma State University, Stillwater, OK, United States.
dc.identifier.volume8
kaust.personLu, Yongchang
kaust.personZhang, Xixiang
kaust.grant.numberOSR-2016-CRG5-2950
dc.date.accepted2020-09-02
refterms.dateFOA2020-10-15T13:19:55Z
kaust.acknowledged.supportUnitOffice of Sponsored Research (OSR)


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This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original
publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Except where otherwise noted, this item's license is described as This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.