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    Gradient Index Devices for Terahertz Spoof Surface Plasmon Polaritons

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    Name:
    ACS Photonics-JG Han-2020.pdf
    Size:
    1.177Mb
    Format:
    PDF
    Description:
    Accepted Manuscript
    Embargo End Date:
    2021-12-08
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    Type
    Article
    Authors
    Su, Xiaoqiang
    Xu, Quan
    Lu, Yongchang
    Zhang, Ziying
    Xu, Yuehong
    Zhang, Xueqian
    Li, Yanfeng
    Ouyang, Chunmei
    Deng, Fusheng
    Liu, Yanhong
    Dong, Lijuan
    Shi, Yunlong
    Zhang, Xixiang cc
    Han, Jiaguang cc
    Zhang, Weili
    KAUST Department
    Physical Science and Engineering Division
    Date
    2020
    Permanent link to this record
    http://hdl.handle.net/10754/666302
    
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    Abstract
    Terahertz electromagnetic fields can be well confined and propagate at structured metal surfaces, known as spoof surface plasmon polaritons (SSPPs). Recent demonstrations of terahertz SSPP waveguides have attracted much attention for their potential in developing ultra-compact plasmonic circuits. However, further progress has been hampered by the lack of complex and high-performance devices which can flexibly manipulate the propagation of terahertz SSPPs. Here, we demonstrate several terahertz gradient index SSPP devices using metallic pillar structures. The devices are realized by engineering the geometric parameters of each metallic pillar to achieve the desired local mode index for the terahertz SSPPs. The performance of these SSPP devices is experimentally characterized using scanning near-field terahertz microscopy. The versatility of the presented design scheme would provide a platform for the design and fabrication of high-performance plasmonic devices, especially cascadable ones in practical applications.
    Citation
    Su, X., Xu, Q., Lu, Y., Zhang, Z., Xu, Y., Zhang, X., … Zhang, W. (2020). Gradient Index Devices for Terahertz Spoof Surface Plasmon Polaritons. ACS Photonics. doi:10.1021/acsphotonics.0c01323
    Sponsors
    This work was funded by National Natural Science Foundation of China (61805129, 11874245, 61875150, 61935015, 11974259, 61775159, 62005193, 62075158); Applied Basic Research Project of ShanXi Province (201801D221161); Key Research and Development Program of Shanxi Province (201903D121026, 201903D121071); Applied Basic Research Project of Datong City (2018148); China Postdoctoral Science Foundation (2020TQ0224); Tianjin Municipal Fund for Distinguished Young Scholars (18JCJQJC45600); and KAUST Office of Sponsored Research (URF-2950-CRG5).
    Publisher
    Accepted by ACS
    Journal
    Accepted by ACS Photonics
    DOI
    10.1021/acsphotonics.0c01323
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsphotonics.0c01323
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