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dc.contributor.authorYuan, Mingrui
dc.contributor.authorWang, Qingwei
dc.contributor.authorLi, Yanfeng
dc.contributor.authorZhang, Xixiang
dc.contributor.authorHan, Jiaguang
dc.contributor.authorZhang, Weili
dc.date.accessioned2020-10-29T10:46:28Z
dc.date.available2020-10-29T10:46:28Z
dc.date.issued2020-11-17
dc.identifier.citationYuan, M., Wang, Q., Li, Y., Zhang, X., Han, J., & Zhang, W. (2020). Ultra-compact terahertz plasmonic wavelengthdiplexer. Applied Optics. doi:10.1364/ao.409828
dc.identifier.issn1559-128X
dc.identifier.issn2155-3165
dc.identifier.doi10.1364/ao.409828
dc.identifier.urihttp://hdl.handle.net/10754/665709
dc.description.abstractTerahertz (THz) spoof surface plasmon polariton (SPP) waveguides can provide subwavelength confinement, which makes it possible for the THz waves to transmit at low loss over long distances along a metallic surface. In this work, an ultra-compact wavelength diplexer formed by THz spoof SPP waveguiding structures is reported on the design and actualization. By adding a certain number of periodic pillars in the coupling part of the directional coupler, the refractive index of the anti-symmetrically distributed odd modes can be engineered, thereby adjusting the coupling length. By adjusting the periodic pillar parameters properly, the SPP modes at two target frequencies will be coupled in the device for an odd or even number of times, so that SPP modes at these two frequencies can be coupled out from different ports. The length of the wavelength diplexer is 1.6 mm, which is about 12.8% of its traditional counterpart. Minimum simulated transmittances of -24.34 dB and -26.27 dB can be obtained at 0.637 THz and 0.667 THz, respectively. The insertion losses at the two operating frequencies are less than 0.46 dB, and the extinction ratios are both better than 19 dB. By cascading the proposed diplexers, a compact wavelength demultiplexer with more channels can be obtained, which has important applications for future THz integrated communication systems.
dc.description.sponsorshipThis work was funded by National Key Research and Development Program of China (2017YFA0701004); National Natural Science Foundation of China (61935015, 61875150, 61605143, 61735012, 61722509, and 61871212); Tianjin Municipal Fund for Distinguished Young Scholars (18JCJQJC45600); and King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) (OSR2016-CRG5-2950).
dc.publisherThe Optical Society
dc.relation.urlhttps://www.osapublishing.org/ao/abstract.cfm?doi=10.1364/AO.409828
dc.rightsArchived with thanks to Applied Optics
dc.titleUltra-compact terahertz plasmonic wavelength diplexer
dc.typeArticle
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalApplied Optics
dc.eprint.versionPost-print
dc.contributor.institutionCenter for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Key Laboratory of Optoelectronics Information and Technology (Ministry of Education of China), Tianjin University, Tianjin 300072, China .
dc.contributor.institutionSchool of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA.
kaust.personWang, Qingwei
kaust.personZhang, Xixiang
kaust.grant.numberOSR2016-CRG5-2950
refterms.dateFOA2020-10-29T10:47:17Z
kaust.acknowledged.supportUnitOffice of Sponsored Research (OSR)
dc.date.published-online2020-11-17
dc.date.published-print2020-11-20


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