High-performance and compact broadband terahertz plasmonic waveguide intersection

Abstract
For terahertz (THz) integrated systems, an intersection between waveguides is inevitable and is often accompanied by considerable crosstalk and loss. Here, we propose and experimentally demonstrate a novel type of crossing with a footprint less than 0.2 × 0.2 mm2 for THz surface plasmon polariton waveguiding. With an optimized crossover structure, the measured loss of the intersection is as low as 0.89 dB/crossing, and the crosstalk is less than-19.06 dB/crossing at 0.55 THz. The proposed crossing structure is compact and has low loss and crosstalk within a broad band, which will pave the way for a wide range of new applications for THz integrated systems.

Citation
Yuan, M., Li, Y., Lu, Y., Zhang, Y., Zhang, Z., Zhang, X., … Zhang, W. (2019). High-performance and compact broadband terahertz plasmonic waveguide intersection. Nanophotonics, 0(0). doi:10.1515/nanoph-2019-0191

Acknowledgements
The research reported in this publication was supported by the National Key Research and Development Program of China (grant no. 2017YFA0701004), the National Science Foundation of China (grant nos. 61875150, 61605143, 61735012, 61420106006, 61722509, and 61871212), the Tianjin Municipal Fund for Distinguished Young Scholars (grant no. 18JCJQJC45600), and King Abdullah University of Science and Technology (KAUST: CRF-2016-2950-CRG5).

Publisher
Walter de Gruyter GmbH

Journal
Nanophotonics

DOI
10.1515/nanoph-2019-0191

Additional Links
http://www.degruyter.com/view/j/nanoph.ahead-of-print/nanoph-2019-0191/nanoph-2019-0191.xml

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