Bloch-Surface-Polariton-Based Hybrid Nanowire Structure for Subwavelength, Low-Loss Waveguiding
Surface plasmon polaritons (SPPs) have been thoroughly studied in the past decades for not only sensing but also waveguiding applications. Various plasmonic device structures have been explored due to their ability to confine their optical mode to the subwavelength level. However, with the existence...
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MDPI AG
2018-03-01
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| Series: | Applied Sciences |
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| Online Access: | http://www.mdpi.com/2076-3417/8/3/358 |
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| author | Weijing Kong Yuhang Wan Wenhui Zhao Shuna Li Zheng Zheng |
| author_facet | Weijing Kong Yuhang Wan Wenhui Zhao Shuna Li Zheng Zheng |
| author_sort | Weijing Kong |
| collection | DOAJ |
| description | Surface plasmon polaritons (SPPs) have been thoroughly studied in the past decades for not only sensing but also waveguiding applications. Various plasmonic device structures have been explored due to their ability to confine their optical mode to the subwavelength level. However, with the existence of metal, the large ohmic loss limits the propagation distance of the SPP and thus the scalability of such devices. Therefore, different hybrid waveguides have been proposed to overcome this shortcoming. Through fine tuning of the coupling between the SPP and a conventional waveguide mode, a hybrid mode could be excited with decent mode confinement and extended propagation distance. As an effective alternative of SPP, Bloch surface waves have been re-investigated more recently for their unique advantages. As is supported in all-dielectric structures, the optical loss for the Bloch surface wave is much lower, which stands for a much longer propagating distance. Yet, the confinement of the Bloch surface wave due to the reflections and refractions in the multilayer structure is not as tight as that of the SPP. In this work, by integrating a periodic multilayer structure that supports the Bloch surface wave with a metallic nanowire structure, a hybrid Bloch surface wave polariton could be excited. With the proposed hybrid nanowire structure, a hybrid mode is demonstrated with the deep subwavelength mode confinement and a propagation distance of tens of microns. |
| first_indexed | 2024-12-21T19:13:44Z |
| format | Article |
| id | doaj.art-a79a60e0c08a4e5d91f9688c562b11be |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-21T19:13:44Z |
| publishDate | 2018-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-a79a60e0c08a4e5d91f9688c562b11be2022-12-21T18:53:07ZengMDPI AGApplied Sciences2076-34172018-03-018335810.3390/app8030358app8030358Bloch-Surface-Polariton-Based Hybrid Nanowire Structure for Subwavelength, Low-Loss WaveguidingWeijing Kong0Yuhang Wan1Wenhui Zhao2Shuna Li3Zheng Zheng4School of Electronic Engineering, Tianjin University of Technology and Education, 1310 Dagu South Rd., Tianjin 300222, ChinaSchool of Electronic and Information Engineering, Beihang University, 37 Xueyuan Rd, Beijing 100191, ChinaSchool of Electronic Engineering, Tianjin University of Technology and Education, 1310 Dagu South Rd., Tianjin 300222, ChinaNational Key Laboratory for Electronic Measurement Technology, North University of China, 3 Xueyuan Rd., Shanxi, Taiyuan 030051, ChinaSchool of Electronic and Information Engineering, Beihang University, 37 Xueyuan Rd, Beijing 100191, ChinaSurface plasmon polaritons (SPPs) have been thoroughly studied in the past decades for not only sensing but also waveguiding applications. Various plasmonic device structures have been explored due to their ability to confine their optical mode to the subwavelength level. However, with the existence of metal, the large ohmic loss limits the propagation distance of the SPP and thus the scalability of such devices. Therefore, different hybrid waveguides have been proposed to overcome this shortcoming. Through fine tuning of the coupling between the SPP and a conventional waveguide mode, a hybrid mode could be excited with decent mode confinement and extended propagation distance. As an effective alternative of SPP, Bloch surface waves have been re-investigated more recently for their unique advantages. As is supported in all-dielectric structures, the optical loss for the Bloch surface wave is much lower, which stands for a much longer propagating distance. Yet, the confinement of the Bloch surface wave due to the reflections and refractions in the multilayer structure is not as tight as that of the SPP. In this work, by integrating a periodic multilayer structure that supports the Bloch surface wave with a metallic nanowire structure, a hybrid Bloch surface wave polariton could be excited. With the proposed hybrid nanowire structure, a hybrid mode is demonstrated with the deep subwavelength mode confinement and a propagation distance of tens of microns.http://www.mdpi.com/2076-3417/8/3/358Bloch surface polaritonsurface plasmon polaritonwaveguidehybrid mode |
| spellingShingle | Weijing Kong Yuhang Wan Wenhui Zhao Shuna Li Zheng Zheng Bloch-Surface-Polariton-Based Hybrid Nanowire Structure for Subwavelength, Low-Loss Waveguiding Applied Sciences Bloch surface polariton surface plasmon polariton waveguide hybrid mode |
| title | Bloch-Surface-Polariton-Based Hybrid Nanowire Structure for Subwavelength, Low-Loss Waveguiding |
| title_full | Bloch-Surface-Polariton-Based Hybrid Nanowire Structure for Subwavelength, Low-Loss Waveguiding |
| title_fullStr | Bloch-Surface-Polariton-Based Hybrid Nanowire Structure for Subwavelength, Low-Loss Waveguiding |
| title_full_unstemmed | Bloch-Surface-Polariton-Based Hybrid Nanowire Structure for Subwavelength, Low-Loss Waveguiding |
| title_short | Bloch-Surface-Polariton-Based Hybrid Nanowire Structure for Subwavelength, Low-Loss Waveguiding |
| title_sort | bloch surface polariton based hybrid nanowire structure for subwavelength low loss waveguiding |
| topic | Bloch surface polariton surface plasmon polariton waveguide hybrid mode |
| url | http://www.mdpi.com/2076-3417/8/3/358 |
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