Curved terahertz surface plasmonic waveguide devices

License
https://doi.org/10.1364/OA_License_v1

Type
Article

Authors
Yuan, Mingrui
Lu, Yongchang
Zhang, Ying
Zhang, Ziying
Li, Yanfeng
Liu, Hongchao
Zhang, Xixiang
Han, Jiaguang
Zhang, Weili

KAUST Department
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division

KAUST Grant Number
OSR-2016-CRG5-2950

Online Publication Date
2020-01-14

Print Publication Date
2020-01-20

Date
2020-01-14

Submitted Date
2019-12-12

Abstract
Strongly confined surface waves can be achieved on periodically structured metal surfaces and are known as spoof surface plasmon polaritons (SPPs). In this work, several terahertz SPP devices based on curved waveguides are demonstrated. The transmittance and bending loss of 90-degree curved spoof SPP waveguides with a radius of curvature ranging from 200 to 2300 µm are investigated to identify the regime for high transmission. A commutator is designed and experimentally demonstrated. Furthermore, coupling equations are derived and verified for efficient coupling between bend-straight waveguides and between bend-bend waveguides. The results will be of great value for future integrated terahertz plasmonic systems.

Citation
Yuan, M., Lu, Y., Zhang, Y., Zhang, Z., Li, Y., Liu, H., … Zhang, W. (2020). Curved terahertz surface plasmonic waveguide devices. Optics Express, 28(2), 1987. doi:10.1364/oe.385676

Acknowledgements
National Key Research and Development Program of China (2017YFA0701004); National Natural Science Foundation of China (61605143, 61722509, 61735012, 61871212, 61875150, 61935015); Tianjin Municipal Fund for Distinguished Young Scholars (18JCJQJC45600); King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) (OSR-2016-CRG5-2950).

Publisher
The Optical Society

Journal
Optics Express

DOI
10.1364/OE.385676

Additional Links
https://www.osapublishing.org/abstract.cfm?URI=oe-28-2-1987

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