Sensitivity-Enhanced SPR Sensor Based on Graphene and Subwavelength Silver Gratings
A novel surface plasmon resonance (SPR) sensor with graphene and subwavelength gratings is proposed to improve the sensing performance. A series of numerical analyses were performed to investigate the effect of structural parameters on the sensing performance, such as minimum reflectance at resonanc...
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| Format: | Article |
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MDPI AG
2020-10-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/10/11/2125 |
| _version_ | 1827703498379100160 |
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| author | Lu Kong Jiangtao Lv Qiongchan Gu Yu Ying Xiaoxiao Jiang Guangyuan Si |
| author_facet | Lu Kong Jiangtao Lv Qiongchan Gu Yu Ying Xiaoxiao Jiang Guangyuan Si |
| author_sort | Lu Kong |
| collection | DOAJ |
| description | A novel surface plasmon resonance (SPR) sensor with graphene and subwavelength gratings is proposed to improve the sensing performance. A series of numerical analyses were performed to investigate the effect of structural parameters on the sensing performance, such as minimum reflectance at resonance (MRR), full width at half maximum (FWHM), and resonance angle. The results indicated that near-zero MRR (2.9 × 10<sup>−6</sup>) and narrow FWHM (about 3.5 deg) could be obtained by optimizing the geometrical parameters. Moreover, the influence of the number of graphene layers on sensitivity was also studied. The maximum sensitivity of the designed sensor could reach 192 deg/refractive index unit (RIU), which is a great enhancement compared to the silver-only SPR sensor. In addition, ethylene glycol solutions with different refractive indices were detected. The results showed that the sensitivity of the sensor could reach 220.67 deg/RIU, and the proposed sensor had excellent linearity between the resonance angle and refractive index, enabling extensive potential practical sensing applications. |
| first_indexed | 2024-03-10T15:19:54Z |
| format | Article |
| id | doaj.art-9360f263f8b3492ea7e55f9db6d3392a |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T15:19:54Z |
| publishDate | 2020-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-9360f263f8b3492ea7e55f9db6d3392a2023-11-20T18:34:03ZengMDPI AGNanomaterials2079-49912020-10-011011212510.3390/nano10112125Sensitivity-Enhanced SPR Sensor Based on Graphene and Subwavelength Silver GratingsLu Kong0Jiangtao Lv1Qiongchan Gu2Yu Ying3Xiaoxiao Jiang4Guangyuan Si5College of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066004, ChinaCollege of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066004, ChinaHebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao 066004, ChinaCollege of Information & Control Engineering, Shenyang Jianzhu University, Shenyang 110168, ChinaHebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao 066004, ChinaCollege of Control Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066004, ChinaA novel surface plasmon resonance (SPR) sensor with graphene and subwavelength gratings is proposed to improve the sensing performance. A series of numerical analyses were performed to investigate the effect of structural parameters on the sensing performance, such as minimum reflectance at resonance (MRR), full width at half maximum (FWHM), and resonance angle. The results indicated that near-zero MRR (2.9 × 10<sup>−6</sup>) and narrow FWHM (about 3.5 deg) could be obtained by optimizing the geometrical parameters. Moreover, the influence of the number of graphene layers on sensitivity was also studied. The maximum sensitivity of the designed sensor could reach 192 deg/refractive index unit (RIU), which is a great enhancement compared to the silver-only SPR sensor. In addition, ethylene glycol solutions with different refractive indices were detected. The results showed that the sensitivity of the sensor could reach 220.67 deg/RIU, and the proposed sensor had excellent linearity between the resonance angle and refractive index, enabling extensive potential practical sensing applications.https://www.mdpi.com/2079-4991/10/11/2125surface plasmon resonancegraphenesubwavelength gratingsensitivity |
| spellingShingle | Lu Kong Jiangtao Lv Qiongchan Gu Yu Ying Xiaoxiao Jiang Guangyuan Si Sensitivity-Enhanced SPR Sensor Based on Graphene and Subwavelength Silver Gratings Nanomaterials surface plasmon resonance graphene subwavelength grating sensitivity |
| title | Sensitivity-Enhanced SPR Sensor Based on Graphene and Subwavelength Silver Gratings |
| title_full | Sensitivity-Enhanced SPR Sensor Based on Graphene and Subwavelength Silver Gratings |
| title_fullStr | Sensitivity-Enhanced SPR Sensor Based on Graphene and Subwavelength Silver Gratings |
| title_full_unstemmed | Sensitivity-Enhanced SPR Sensor Based on Graphene and Subwavelength Silver Gratings |
| title_short | Sensitivity-Enhanced SPR Sensor Based on Graphene and Subwavelength Silver Gratings |
| title_sort | sensitivity enhanced spr sensor based on graphene and subwavelength silver gratings |
| topic | surface plasmon resonance graphene subwavelength grating sensitivity |
| url | https://www.mdpi.com/2079-4991/10/11/2125 |
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