Theoretical Investigation of Terahertz Spoof Surface-Plasmon-Polariton Devices Based on Ring Resonators
Terahertz is one of the most promising technologies for high-speed communication and large-scale data transmission. As a classical optical component, ring resonators are extensively utilized in the design of band-pass and frequency-selective devices across various wavebands, owing to their unique ch...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-01-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/12/1/70 |
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| author | Can Liu Shenghao Gu Mingming Sun Ya Liu Ying Zhang Jiaguang Han |
| author_facet | Can Liu Shenghao Gu Mingming Sun Ya Liu Ying Zhang Jiaguang Han |
| author_sort | Can Liu |
| collection | DOAJ |
| description | Terahertz is one of the most promising technologies for high-speed communication and large-scale data transmission. As a classical optical component, ring resonators are extensively utilized in the design of band-pass and frequency-selective devices across various wavebands, owing to their unique characteristics, including optical comb generation, compactness, and low manufacturing cost. While substantial progress has been made in the study of ring resonators, their application in terahertz surface wave systems remains less than fully optimized. This paper presents several spoof surface plasmon polariton-based devices, which were realized using ring resonators at terahertz frequencies. The influence of both the radius of the ring resonator and the width of the waveguide coupling gap on the coupling coefficient are investigated. The band-stop filters based on the cascaded ring resonator exhibit a 0.005 THz broader frequency bandwidth compared to the single-ring resonator filter and achieve a minimum stopband attenuation of 28 dB. The add–drop multiplexers based on the asymmetric ring resonator enable selective surface wave outputs at different ports by rotating the ring resonator. The devices designed in this study offer valuable insights for the development of on-chip terahertz components. |
| format | Article |
| id | doaj-art-a88d26bccd4f4c3c82abaa6491a1fec1 |
| institution | Kabale University |
| issn | 2304-6732 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-a88d26bccd4f4c3c82abaa6491a1fec12025-01-24T13:46:24ZengMDPI AGPhotonics2304-67322025-01-011217010.3390/photonics12010070Theoretical Investigation of Terahertz Spoof Surface-Plasmon-Polariton Devices Based on Ring ResonatorsCan Liu0Shenghao Gu1Mingming Sun2Ya Liu3Ying Zhang4Jiaguang Han5Yunnan Key Laboratory of Opto-Electronic Information Technology and Institute of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, ChinaYunnan Key Laboratory of Opto-Electronic Information Technology and Institute of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, ChinaYunnan Key Laboratory of Opto-Electronic Information Technology and Institute of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, ChinaYunnan Key Laboratory of Opto-Electronic Information Technology and Institute of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, ChinaYunnan Key Laboratory of Opto-Electronic Information Technology and Institute of Physics and Electronic Information, Yunnan Normal University, Kunming 650500, ChinaGuangxi Key Laboratory of Optoelectronic Information Processing, School of Optoelectronic Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaTerahertz is one of the most promising technologies for high-speed communication and large-scale data transmission. As a classical optical component, ring resonators are extensively utilized in the design of band-pass and frequency-selective devices across various wavebands, owing to their unique characteristics, including optical comb generation, compactness, and low manufacturing cost. While substantial progress has been made in the study of ring resonators, their application in terahertz surface wave systems remains less than fully optimized. This paper presents several spoof surface plasmon polariton-based devices, which were realized using ring resonators at terahertz frequencies. The influence of both the radius of the ring resonator and the width of the waveguide coupling gap on the coupling coefficient are investigated. The band-stop filters based on the cascaded ring resonator exhibit a 0.005 THz broader frequency bandwidth compared to the single-ring resonator filter and achieve a minimum stopband attenuation of 28 dB. The add–drop multiplexers based on the asymmetric ring resonator enable selective surface wave outputs at different ports by rotating the ring resonator. The devices designed in this study offer valuable insights for the development of on-chip terahertz components.https://www.mdpi.com/2304-6732/12/1/70spoof surface plasmon polaritonsring resonatorterahertz wavefunctional devices |
| spellingShingle | Can Liu Shenghao Gu Mingming Sun Ya Liu Ying Zhang Jiaguang Han Theoretical Investigation of Terahertz Spoof Surface-Plasmon-Polariton Devices Based on Ring Resonators Photonics spoof surface plasmon polaritons ring resonator terahertz wave functional devices |
| title | Theoretical Investigation of Terahertz Spoof Surface-Plasmon-Polariton Devices Based on Ring Resonators |
| title_full | Theoretical Investigation of Terahertz Spoof Surface-Plasmon-Polariton Devices Based on Ring Resonators |
| title_fullStr | Theoretical Investigation of Terahertz Spoof Surface-Plasmon-Polariton Devices Based on Ring Resonators |
| title_full_unstemmed | Theoretical Investigation of Terahertz Spoof Surface-Plasmon-Polariton Devices Based on Ring Resonators |
| title_short | Theoretical Investigation of Terahertz Spoof Surface-Plasmon-Polariton Devices Based on Ring Resonators |
| title_sort | theoretical investigation of terahertz spoof surface plasmon polariton devices based on ring resonators |
| topic | spoof surface plasmon polaritons ring resonator terahertz wave functional devices |
| url | https://www.mdpi.com/2304-6732/12/1/70 |
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