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dc.contributor.authorYuan, Mingrui
dc.contributor.authorWang, Qingwei
dc.contributor.authorLi, Yanfeng
dc.contributor.authorXu, Yuehong
dc.contributor.authorXu, Quan
dc.contributor.authorZhang, Xueqian
dc.contributor.authorZhang, Xixiang
dc.contributor.authorHan, Jiaguang
dc.contributor.authorZhang, Weili
dc.identifier.citationYuan, M., Wang, Q., Li, Y., Xu, Y., Xu, Q., Zhang, X., … Zhang, W. (2020). Terahertz Spoof Surface Plasmonic Logic Gates. iScience, 23(11), 101685. doi:10.1016/j.isci.2020.101685
dc.description.abstractLogic gates are important components in integrated photonic circuitry. Here, a series of logic gates to achieve fundamental logic operations based on linear interference in spoof surface plasmon polariton waveguides are demonstrated at terahertz frequencies. A metasurface-based plasmonic source is adopted to couple free-space terahertz radiation into surface waves, followed by a funnel-shaped metasurface to efficiently couple the surface waves to the waveguides built on a domino structure. A single Mach-Zehnder waveguide interferometer can work as logic gates for four logic functions: AND, NOT, OR, and XOR. By cascading two such interferometers, NAND and NOR operations can also be achieved. Experimental investigations are supported by numerical simulations, and good agreement is obtained. The logic gates have compact sizes and high intensity contrasts for the output “1” and “0” states. More complicated functions can be envisioned and will be of great value for future terahertz integrated computing.
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) (OSR-2016-CRG5-2950).
dc.publisherElsevier BV
dc.rightsThis is an open access article under the CC BY license.
dc.titleTerahertz Spoof Surface Plasmonic Logic Gates
dc.contributor.departmentDivision of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
dc.contributor.departmentMaterial Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionCenter for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, and Key Laboratory of Optoelectronic Information Technology (Ministry of Education), Tianjin University, Tianjin 300072, China.
dc.contributor.institutionSchool of Electrical and Computer Engineering, Oklahoma State University, Stillwater, OK 74078, USA.
kaust.personWang, Qingwei
kaust.personZhang, Xixiang
kaust.acknowledged.supportUnitOffice of Sponsored Research (OSR)

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