KAUST DepartmentDivision of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia.
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant NumberOSR-2016-CRG5-2950
Online Publication Date2020-10-15
Print Publication Date2020-11
Permanent link to this recordhttp://hdl.handle.net/10754/665723
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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.
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
SponsorsThis 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).
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