High Quality Plasmonic Sensors Based on Fano Resonances Created through Cascading Double Asymmetric Cavities
In this paper, a type of compact nanosensor based on a metal-insulator-metal structure is proposed and investigated through cascading double asymmetric cavities, in which their metal cores shift along different axis directions. The cascaded asymmetric structure exhibits high transmission and sharp F...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2016-10-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/16/10/1730 |
| _version_ | 1798040703255707648 |
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| author | Xiangao Zhang Mingzhen Shao Xiaoqi Zeng |
| author_facet | Xiangao Zhang Mingzhen Shao Xiaoqi Zeng |
| author_sort | Xiangao Zhang |
| collection | DOAJ |
| description | In this paper, a type of compact nanosensor based on a metal-insulator-metal structure is proposed and investigated through cascading double asymmetric cavities, in which their metal cores shift along different axis directions. The cascaded asymmetric structure exhibits high transmission and sharp Fano resonance peaks via strengthening the mutual coupling of the cavities. The research results show that with the increase of the symmetry breaking in the structure, the number of Fano resonances increase accordingly. Furthermore, by modulating the geometrical parameters appropriately, Fano resonances with high sensitivities to the changes in refractive index can be realized. A maximum figure of merit (FoM) value of 74.3 is obtained. Considerable applications for this work can be found in bio/chemical sensors with excellent performance and other nanophotonic integrated circuit devices such as optical filters, switches and modulators. |
| first_indexed | 2024-04-11T22:11:14Z |
| format | Article |
| id | doaj.art-e68c4dd7f2e644dc82cd1ff9e121ed24 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T22:11:14Z |
| publishDate | 2016-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-e68c4dd7f2e644dc82cd1ff9e121ed242022-12-22T04:00:34ZengMDPI AGSensors1424-82202016-10-011610173010.3390/s16101730s16101730High Quality Plasmonic Sensors Based on Fano Resonances Created through Cascading Double Asymmetric CavitiesXiangao Zhang0Mingzhen Shao1Xiaoqi Zeng2Department of Physics, South University of Science and Technology of China, Shenzhen 518055, ChinaDepartment of Physics, South University of Science and Technology of China, Shenzhen 518055, ChinaDepartment of Physics, South University of Science and Technology of China, Shenzhen 518055, ChinaIn this paper, a type of compact nanosensor based on a metal-insulator-metal structure is proposed and investigated through cascading double asymmetric cavities, in which their metal cores shift along different axis directions. The cascaded asymmetric structure exhibits high transmission and sharp Fano resonance peaks via strengthening the mutual coupling of the cavities. The research results show that with the increase of the symmetry breaking in the structure, the number of Fano resonances increase accordingly. Furthermore, by modulating the geometrical parameters appropriately, Fano resonances with high sensitivities to the changes in refractive index can be realized. A maximum figure of merit (FoM) value of 74.3 is obtained. Considerable applications for this work can be found in bio/chemical sensors with excellent performance and other nanophotonic integrated circuit devices such as optical filters, switches and modulators.http://www.mdpi.com/1424-8220/16/10/1730reflective index sensorplasmonicsFano resonancemetal-insulator-metal waveguide |
| spellingShingle | Xiangao Zhang Mingzhen Shao Xiaoqi Zeng High Quality Plasmonic Sensors Based on Fano Resonances Created through Cascading Double Asymmetric Cavities Sensors reflective index sensor plasmonics Fano resonance metal-insulator-metal waveguide |
| title | High Quality Plasmonic Sensors Based on Fano Resonances Created through Cascading Double Asymmetric Cavities |
| title_full | High Quality Plasmonic Sensors Based on Fano Resonances Created through Cascading Double Asymmetric Cavities |
| title_fullStr | High Quality Plasmonic Sensors Based on Fano Resonances Created through Cascading Double Asymmetric Cavities |
| title_full_unstemmed | High Quality Plasmonic Sensors Based on Fano Resonances Created through Cascading Double Asymmetric Cavities |
| title_short | High Quality Plasmonic Sensors Based on Fano Resonances Created through Cascading Double Asymmetric Cavities |
| title_sort | high quality plasmonic sensors based on fano resonances created through cascading double asymmetric cavities |
| topic | reflective index sensor plasmonics Fano resonance metal-insulator-metal waveguide |
| url | http://www.mdpi.com/1424-8220/16/10/1730 |
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