| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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Sensitivity improvement of aluminum-based far-ultraviolet nearly guided-wave surface plasmon resonance sensor |
| Tianqi Li(李天琦)1, Shujing Chen(陈淑静)2,†, and Chengyou Lin(林承友)1,‡ |
1 College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China;
2 School of Materials Science and Technology, China University of Geosciences(Beijing), Beijing 100083, China |
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Abstract An aluminum (Al) based nearly guided-wave surface plasmon resonance (NGWSPR) sensor is investigated in the far-ultraviolet (FUV) region. By simultaneously optimizing the thickness of Al and dielectric films, the sensitivity of the optimized Al-based FUV-NGWSPR sensor increases from 183°/RIU to 309°/RIU, and its figure of merit rises from 26.47 RIU-1 to 32.59 RIU-1 when the refractive index of dielectric increases from 2 to 5. Compared with a traditional FUV-SPR sensor without dielectric, the optimized FUV-NGWSPR sensor can realize simultaneous improvement of sensitivity and figure of merit. In addition, the FUV-NGWSPR sensor with realistic materials (diamond, Ta2O5, and GaN) is also investigated, and 137.84%, 52.70%, and 41.89% sensitivity improvements are achieved respectively. This work proposes a method for performance improvement of FUV-SPR sensors by exciting nearly guided-wave, and could be helpful for the high-performance SPR sensor in the short-wavelength region.
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Received: 25 December 2021
Revised: 10 August 2022
Accepted manuscript online: 16 August 2022
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PACS:
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42.81.Pa
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(Sensors, gyros)
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78.20.-e
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(Optical properties of bulk materials and thin films)
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07.60.-j
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(Optical instruments and equipment)
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95.85.Mt
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(Ultraviolet (10-300 nm))
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61805007 and 11547241). |
Corresponding Authors:
Shujing Chen, Chengyou Lin
E-mail: chenshujing@cugb.edu.cn;cylin@mail.buct.edu.cn
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Cite this article:
Tianqi Li(李天琦), Shujing Chen(陈淑静), and Chengyou Lin(林承友) Sensitivity improvement of aluminum-based far-ultraviolet nearly guided-wave surface plasmon resonance sensor 2022 Chin. Phys. B 31 124208
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