Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures
This work proposed a multiple mode Fano resonance-based refractive index sensor with high sensitivity that is a rarely investigated structure. The designed device consists of a metal–insulator–metal (MIM) waveguide with two rectangular stubs side-coupled with an elliptical resonator embedded with an...
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MDPI AG
2021-08-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/8/2097 |
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| author | Yuan-Fong Chou Chau Chung-Ting Chou Chao Siti Zubaidah Binti Haji Jumat Muhammad Raziq Rahimi Kooh Roshan Thotagamuge Chee Ming Lim Hai-Pang Chiang |
| author_facet | Yuan-Fong Chou Chau Chung-Ting Chou Chao Siti Zubaidah Binti Haji Jumat Muhammad Raziq Rahimi Kooh Roshan Thotagamuge Chee Ming Lim Hai-Pang Chiang |
| author_sort | Yuan-Fong Chou Chau |
| collection | DOAJ |
| description | This work proposed a multiple mode Fano resonance-based refractive index sensor with high sensitivity that is a rarely investigated structure. The designed device consists of a metal–insulator–metal (MIM) waveguide with two rectangular stubs side-coupled with an elliptical resonator embedded with an air path in the resonator and several metal defects set in the bus waveguide. We systematically studied three types of sensor structures employing the finite element method. Results show that the surface plasmon mode’s splitting is affected by the geometry of the sensor. We found that the transmittance dips and peaks can dramatically change by adding the dual air stubs, and the light–matter interaction can effectively enhance by embedding an air path in the resonator and the metal defects in the bus waveguide. The double air stubs and an air path contribute to the cavity plasmon resonance, and the metal defects facilitate the gap plasmon resonance in the proposed plasmonic sensor, resulting in remarkable characteristics compared with those of plasmonic sensors. The high sensitivity of 2600 nm/RIU and 1200 nm/RIU can simultaneously achieve in mode 1 and mode 2 of the proposed type 3 structure, which considerably raises the sensitivity by 216.67% for mode 1 and 133.33% for mode 2 compared to its regular counterpart, i.e., type 2 structure. The designed sensing structure can detect the material’s refractive index in a wide range of gas, liquids, and biomaterials (e.g., hemoglobin concentration). |
| first_indexed | 2024-03-10T08:31:47Z |
| format | Article |
| id | doaj.art-fd1de0cc65f04d9c9463fcf592145a3c |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T08:31:47Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-fd1de0cc65f04d9c9463fcf592145a3c2023-11-22T09:00:27ZengMDPI AGNanomaterials2079-49912021-08-01118209710.3390/nano11082097Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal NanostructuresYuan-Fong Chou Chau0Chung-Ting Chou Chao1Siti Zubaidah Binti Haji Jumat2Muhammad Raziq Rahimi Kooh3Roshan Thotagamuge4Chee Ming Lim5Hai-Pang Chiang6Centre for Advanced Material and Energy Sciences, Universiti Brunei Darussalam, Tungku Link, Gadong BE1410, BruneiDepartment of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 20224, TaiwanCentre for Advanced Material and Energy Sciences, Universiti Brunei Darussalam, Tungku Link, Gadong BE1410, BruneiCentre for Advanced Material and Energy Sciences, Universiti Brunei Darussalam, Tungku Link, Gadong BE1410, BruneiCentre for Advanced Material and Energy Sciences, Universiti Brunei Darussalam, Tungku Link, Gadong BE1410, BruneiCentre for Advanced Material and Energy Sciences, Universiti Brunei Darussalam, Tungku Link, Gadong BE1410, BruneiDepartment of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 20224, TaiwanThis work proposed a multiple mode Fano resonance-based refractive index sensor with high sensitivity that is a rarely investigated structure. The designed device consists of a metal–insulator–metal (MIM) waveguide with two rectangular stubs side-coupled with an elliptical resonator embedded with an air path in the resonator and several metal defects set in the bus waveguide. We systematically studied three types of sensor structures employing the finite element method. Results show that the surface plasmon mode’s splitting is affected by the geometry of the sensor. We found that the transmittance dips and peaks can dramatically change by adding the dual air stubs, and the light–matter interaction can effectively enhance by embedding an air path in the resonator and the metal defects in the bus waveguide. The double air stubs and an air path contribute to the cavity plasmon resonance, and the metal defects facilitate the gap plasmon resonance in the proposed plasmonic sensor, resulting in remarkable characteristics compared with those of plasmonic sensors. The high sensitivity of 2600 nm/RIU and 1200 nm/RIU can simultaneously achieve in mode 1 and mode 2 of the proposed type 3 structure, which considerably raises the sensitivity by 216.67% for mode 1 and 133.33% for mode 2 compared to its regular counterpart, i.e., type 2 structure. The designed sensing structure can detect the material’s refractive index in a wide range of gas, liquids, and biomaterials (e.g., hemoglobin concentration).https://www.mdpi.com/2079-4991/11/8/2097metal-insulator-metalrefractive index sensordual ai stubsair pathmetal defectsfinite element method |
| spellingShingle | Yuan-Fong Chou Chau Chung-Ting Chou Chao Siti Zubaidah Binti Haji Jumat Muhammad Raziq Rahimi Kooh Roshan Thotagamuge Chee Ming Lim Hai-Pang Chiang Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures Nanomaterials metal-insulator-metal refractive index sensor dual ai stubs air path metal defects finite element method |
| title | Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures |
| title_full | Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures |
| title_fullStr | Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures |
| title_full_unstemmed | Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures |
| title_short | Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures |
| title_sort | improved refractive index sensing performance of multimode fano resonance based metal insulator metal nanostructures |
| topic | metal-insulator-metal refractive index sensor dual ai stubs air path metal defects finite element method |
| url | https://www.mdpi.com/2079-4991/11/8/2097 |
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