High-Sensitive Refractive Index Sensing Enabled by Topological Charge Evolution
A high-sensitive refractive index sensor is proposed and demonstrated by utilizing merging bound states in the continuum, namely a set of integer topological charges in the momentum space. Through varying cladding refractive index nc, the topological charges continuously depart from the merging stat...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2020-01-01
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| Series: | IEEE Photonics Journal |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9171415/ |
| _version_ | 1819163312137437184 |
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| author | Jiaxin Lv Zihao Chen Xuefan Yin Zixuan Zhang Weiwei Hu Chao Peng |
| author_facet | Jiaxin Lv Zihao Chen Xuefan Yin Zixuan Zhang Weiwei Hu Chao Peng |
| author_sort | Jiaxin Lv |
| collection | DOAJ |
| description | A high-sensitive refractive index sensor is proposed and demonstrated by utilizing merging bound states in the continuum, namely a set of integer topological charges in the momentum space. Through varying cladding refractive index nc, the topological charges continuously depart from the merging state, and result in the robust and considerable high-Q factors (above 7 × 10<sup>4</sup>) in a large detection range of 0.456. In such a range, sensing sensitivity of ~36 nm/RIU and figure-of-merit from ~5990 (air) to 1607 (n<sub>c</sub> = 1.456) are achieved. Meanwhile, the detection limit on the order of 10<sup>-5</sup> RIU is clearly distinguishable from the measured spectrum under tiny variation of cladding refractive index. Our work paves the way for promising integrated high-sensitive sensors in many biological and chemical applications. |
| first_indexed | 2024-12-22T17:42:08Z |
| format | Article |
| id | doaj.art-292187d26b864c14870cf21a1751b89a |
| institution | Directory Open Access Journal |
| issn | 1943-0655 |
| language | English |
| last_indexed | 2024-12-22T17:42:08Z |
| publishDate | 2020-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj.art-292187d26b864c14870cf21a1751b89a2022-12-21T18:18:23ZengIEEEIEEE Photonics Journal1943-06552020-01-0112511010.1109/JPHOT.2020.30178069171415High-Sensitive Refractive Index Sensing Enabled by Topological Charge EvolutionJiaxin Lv0Zihao Chen1https://orcid.org/0000-0002-6125-3306Xuefan Yin2Zixuan Zhang3Weiwei Hu4Chao Peng5https://orcid.org/0000-0002-0200-0798State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronics, Peking University, Beijing, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronics, Peking University, Beijing, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronics, Peking University, Beijing, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronics, Peking University, Beijing, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronics, Peking University, Beijing, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronics, Peking University, Beijing, ChinaA high-sensitive refractive index sensor is proposed and demonstrated by utilizing merging bound states in the continuum, namely a set of integer topological charges in the momentum space. Through varying cladding refractive index nc, the topological charges continuously depart from the merging state, and result in the robust and considerable high-Q factors (above 7 × 10<sup>4</sup>) in a large detection range of 0.456. In such a range, sensing sensitivity of ~36 nm/RIU and figure-of-merit from ~5990 (air) to 1607 (n<sub>c</sub> = 1.456) are achieved. Meanwhile, the detection limit on the order of 10<sup>-5</sup> RIU is clearly distinguishable from the measured spectrum under tiny variation of cladding refractive index. Our work paves the way for promising integrated high-sensitive sensors in many biological and chemical applications.https://ieeexplore.ieee.org/document/9171415/Photonic crystaloptical sensorhigh-<inline-formula xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <tex-math notation="LaTeX">$Q$</tex-math> </inline-formula> resonancetopological chargebound state in the continuum |
| spellingShingle | Jiaxin Lv Zihao Chen Xuefan Yin Zixuan Zhang Weiwei Hu Chao Peng High-Sensitive Refractive Index Sensing Enabled by Topological Charge Evolution IEEE Photonics Journal Photonic crystal optical sensor high-<inline-formula xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <tex-math notation="LaTeX">$Q$</tex-math> </inline-formula> resonance topological charge bound state in the continuum |
| title | High-Sensitive Refractive Index Sensing Enabled by Topological Charge Evolution |
| title_full | High-Sensitive Refractive Index Sensing Enabled by Topological Charge Evolution |
| title_fullStr | High-Sensitive Refractive Index Sensing Enabled by Topological Charge Evolution |
| title_full_unstemmed | High-Sensitive Refractive Index Sensing Enabled by Topological Charge Evolution |
| title_short | High-Sensitive Refractive Index Sensing Enabled by Topological Charge Evolution |
| title_sort | high sensitive refractive index sensing enabled by topological charge evolution |
| topic | Photonic crystal optical sensor high-<inline-formula xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <tex-math notation="LaTeX">$Q$</tex-math> </inline-formula> resonance topological charge bound state in the continuum |
| url | https://ieeexplore.ieee.org/document/9171415/ |
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