Negative group velocity characteristics of spoof surface plasmon polaritons
Although there have been many discussions on negative group velocity (NGV), disagreements over its counter-intuitive explanations are still on the way. In this paper, it is proposed that the negative group velocity is just a component of the actual wave group, which has to be accompanied by a positi...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2023-03-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0141185 |
| _version_ | 1827892729177178112 |
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| author | Jun Lei Weiwen Li Qian Qiao Lei Zhang Jie Lin |
| author_facet | Jun Lei Weiwen Li Qian Qiao Lei Zhang Jie Lin |
| author_sort | Jun Lei |
| collection | DOAJ |
| description | Although there have been many discussions on negative group velocity (NGV), disagreements over its counter-intuitive explanations are still on the way. In this paper, it is proposed that the negative group velocity is just a component of the actual wave group, which has to be accompanied by a positive group velocity (PGV) component. A composite wave with the NGV component propagates forward in the form of a tumbling vortex as an attenuated or evanescent wave. Negative group velocity exists only in the anomalous dispersion band with resonance absorption. This wave group model is confirmed by the NGV characteristics of spoof surface plasmon polaritons (SSPPs) of spiral-shaped periodic units. In this case, the PGV and NGV waves are formed by the resonance coupling of periodic cells, and the composite SSPP modes have both resonance absorption attenuation and vortex cancellation attenuation. |
| first_indexed | 2024-03-12T21:44:14Z |
| format | Article |
| id | doaj.art-55ccd7c544574961af0c49f89303842c |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-03-12T21:44:14Z |
| publishDate | 2023-03-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-55ccd7c544574961af0c49f89303842c2023-07-26T14:03:58ZengAIP Publishing LLCAIP Advances2158-32262023-03-01133035214035214-810.1063/5.0141185Negative group velocity characteristics of spoof surface plasmon polaritonsJun Lei0Weiwen Li1Qian Qiao2Lei Zhang3Jie Lin4Department of Electronic Engineering, Xiamen University, Xiamen 361005, People’s Republic of ChinaDepartment of Electronic Engineering, Xiamen University, Xiamen 361005, People’s Republic of ChinaDepartment of Electronic Engineering, Xiamen University, Xiamen 361005, People’s Republic of ChinaDepartment of Electronic Engineering, Xiamen University, Xiamen 361005, People’s Republic of ChinaDepartment of Electronic Engineering, Xiamen University, Xiamen 361005, People’s Republic of ChinaAlthough there have been many discussions on negative group velocity (NGV), disagreements over its counter-intuitive explanations are still on the way. In this paper, it is proposed that the negative group velocity is just a component of the actual wave group, which has to be accompanied by a positive group velocity (PGV) component. A composite wave with the NGV component propagates forward in the form of a tumbling vortex as an attenuated or evanescent wave. Negative group velocity exists only in the anomalous dispersion band with resonance absorption. This wave group model is confirmed by the NGV characteristics of spoof surface plasmon polaritons (SSPPs) of spiral-shaped periodic units. In this case, the PGV and NGV waves are formed by the resonance coupling of periodic cells, and the composite SSPP modes have both resonance absorption attenuation and vortex cancellation attenuation.http://dx.doi.org/10.1063/5.0141185 |
| spellingShingle | Jun Lei Weiwen Li Qian Qiao Lei Zhang Jie Lin Negative group velocity characteristics of spoof surface plasmon polaritons AIP Advances |
| title | Negative group velocity characteristics of spoof surface plasmon polaritons |
| title_full | Negative group velocity characteristics of spoof surface plasmon polaritons |
| title_fullStr | Negative group velocity characteristics of spoof surface plasmon polaritons |
| title_full_unstemmed | Negative group velocity characteristics of spoof surface plasmon polaritons |
| title_short | Negative group velocity characteristics of spoof surface plasmon polaritons |
| title_sort | negative group velocity characteristics of spoof surface plasmon polaritons |
| url | http://dx.doi.org/10.1063/5.0141185 |
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