Ultra-Low-Loss High-Contrast Gratings Based Spoof Surface Plasmonic Waveguide
Large metallic losses and short propagation lengths associated with surface plasmons (SPs) have long been considered as the obstacles which severely limit the practical applications of surface plasmonic waveguides. In this paper, we introduce the concept of dielectric spoof SPs (SSPs) and show that...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2017
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| Online Access: | https://hdl.handle.net/10356/85820 http://hdl.handle.net/10220/43849 |
| _version_ | 1826120706535981056 |
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| author | Liu, Liangliang Li, Zhuo Xu, Bingzheng Gu, Changqing Chen, Xinlei Sun, Hengyi Zhou, Yongjin Qing, Quan Shum, Ping Luo, Yu |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Liu, Liangliang Li, Zhuo Xu, Bingzheng Gu, Changqing Chen, Xinlei Sun, Hengyi Zhou, Yongjin Qing, Quan Shum, Ping Luo, Yu |
| author_sort | Liu, Liangliang |
| collection | NTU |
| description | Large metallic losses and short propagation lengths associated with surface plasmons (SPs) have long been considered as the obstacles which severely limit the practical applications of surface plasmonic waveguides. In this paper, we introduce the concept of dielectric spoof SPs (SSPs) and show that subwavelength high-contrast gratings (HCGs) offer a route to effectively suppress the losses and hence dramatically increase the propagation length of surface electromagnetic waves. We experimentally realized a wideband ultra-low-loss high-confinement plasmonic waveguide constructed by a high refractive-index dielectric array with deep-subwavelength periodicity on a metal substrate. Simulation and measurement results on the near-field distributions and S-parameters at microwave frequencies provide explicit evidences of strong field localization and show excellent transmission efficiency of HCGs-based SSPs across a broad frequency band. More importantly, the propagation length of the HCGs-based SSPs is proved to be at least more than one order of magnitude larger than that of metallic gratings-based SSPs at the same or even higher level of field confinement. Thus, the SSPs as experimentally realized in this paper hold great promise for numerous practical applications in ultra-low-loss and long-range transmission SP devices and circuits and may open up new vistas in SP optics. |
| first_indexed | 2024-10-01T05:20:49Z |
| format | Journal Article |
| id | ntu-10356/85820 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:20:49Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-10356/858202020-03-07T13:57:29Z Ultra-Low-Loss High-Contrast Gratings Based Spoof Surface Plasmonic Waveguide Liu, Liangliang Li, Zhuo Xu, Bingzheng Gu, Changqing Chen, Xinlei Sun, Hengyi Zhou, Yongjin Qing, Quan Shum, Ping Luo, Yu School of Electrical and Electronic Engineering Experimental Realization High-contrast Gratings (HCGs) Large metallic losses and short propagation lengths associated with surface plasmons (SPs) have long been considered as the obstacles which severely limit the practical applications of surface plasmonic waveguides. In this paper, we introduce the concept of dielectric spoof SPs (SSPs) and show that subwavelength high-contrast gratings (HCGs) offer a route to effectively suppress the losses and hence dramatically increase the propagation length of surface electromagnetic waves. We experimentally realized a wideband ultra-low-loss high-confinement plasmonic waveguide constructed by a high refractive-index dielectric array with deep-subwavelength periodicity on a metal substrate. Simulation and measurement results on the near-field distributions and S-parameters at microwave frequencies provide explicit evidences of strong field localization and show excellent transmission efficiency of HCGs-based SSPs across a broad frequency band. More importantly, the propagation length of the HCGs-based SSPs is proved to be at least more than one order of magnitude larger than that of metallic gratings-based SSPs at the same or even higher level of field confinement. Thus, the SSPs as experimentally realized in this paper hold great promise for numerous practical applications in ultra-low-loss and long-range transmission SP devices and circuits and may open up new vistas in SP optics. MOE (Min. of Education, S’pore) 2017-10-04T05:46:54Z 2019-12-06T16:10:47Z 2017-10-04T05:46:54Z 2019-12-06T16:10:47Z 2017 Journal Article Liu, L., Li, Z., Xu, B., Gu, C., Chen, X., Sun, H., et al. (2017). Ultra-Low-Loss High-Contrast Gratings Based Spoof Surface Plasmonic Waveguide. IEEE Transactions on Microwave Theory and Techniques, 65(6), 2008-2018. 0018-9480 https://hdl.handle.net/10356/85820 http://hdl.handle.net/10220/43849 10.1109/TMTT.2017.2662235 en IEEE Transactions on Microwave Theory and Techniques © 2017 IEEE. |
| spellingShingle | Experimental Realization High-contrast Gratings (HCGs) Liu, Liangliang Li, Zhuo Xu, Bingzheng Gu, Changqing Chen, Xinlei Sun, Hengyi Zhou, Yongjin Qing, Quan Shum, Ping Luo, Yu Ultra-Low-Loss High-Contrast Gratings Based Spoof Surface Plasmonic Waveguide |
| title | Ultra-Low-Loss High-Contrast Gratings Based Spoof Surface Plasmonic Waveguide |
| title_full | Ultra-Low-Loss High-Contrast Gratings Based Spoof Surface Plasmonic Waveguide |
| title_fullStr | Ultra-Low-Loss High-Contrast Gratings Based Spoof Surface Plasmonic Waveguide |
| title_full_unstemmed | Ultra-Low-Loss High-Contrast Gratings Based Spoof Surface Plasmonic Waveguide |
| title_short | Ultra-Low-Loss High-Contrast Gratings Based Spoof Surface Plasmonic Waveguide |
| title_sort | ultra low loss high contrast gratings based spoof surface plasmonic waveguide |
| topic | Experimental Realization High-contrast Gratings (HCGs) |
| url | https://hdl.handle.net/10356/85820 http://hdl.handle.net/10220/43849 |
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