| 双金属层表面等离子体共振传感器品质因子的研究 |
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| 引用本文： | 林承友,陈淑静,尹亮.双金属层表面等离子体共振传感器品质因子的研究[J].北京化工大学学报(自然科学版),2016,43(1):117. |
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| 作者姓名： | 林承友 陈淑静 尹亮 |
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| 作者单位： | 北京农学院农产品有害微生物及农残安全检测与控制北京市重点实验室,北京102206;北京化工大学理学院,北京100029;中国地质大学(北京)材料科学与工程学院,北京,100083 |
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| 基金项目： | 北京市重点实验室开放课题(2064115081) |
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| 摘 要： | 基于光学薄膜理论,研究了银-金双金属层表面等离子体共振(SPR)传感器品质因子的特征。 首先,通过共振角处最低反射率的计算得到了双金属层的最佳厚度配比;其次,研究了最佳厚度配比下双金属层 SPR 传感器的线宽、灵敏度以及品质因子的特征。 研究结果表明,随着双金属层中银膜厚度的增加(或金膜厚度的减小),传感
器的灵敏度和线宽均减小,而传感器的品质因子增大。 当双金属层 SPR 传感器中金膜厚度减小至 0 nm 时(单层银膜 SPR 传感器),传感器的品质因子达到最大值 96.35 RIU-1 。
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| 关 键 词： | 表面等离子体传感器 双金属层 品质因子 |
| 收稿时间： | 2015-09-15 |
Optimization of the figure-of-merit of a bimetallic film surface plasmon resonance sensor |
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| LIN ChengYou,CHEN ShuJing,YIN Liang.Optimization of the figure-of-merit of a bimetallic film surface plasmon resonance sensor[J].Journal of Beijing University of Chemical Technology,2016,43(1):117. |
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| Authors: | LIN ChengYou CHEN ShuJing YIN Liang |
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| Institution: | 1.Beijing Key Laboratory of Agricultural Product Detection and Control for Spoilage Organisms and Pesticides, Beijing University of Agriculture, Beijing 102206;2.Faculty of Science, Beijing University of Chemical Technology, Beijing 100029;3.School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China |
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| Abstract: | Based on thin film optical theory, the figure of merit (FOM) of a silver-gold bimetallic film surface plasmon resonance (SPR) sensor has been studied. First, the optimum thicknesses of a silver-gold bimetallic film which gave the minimum reflectance at the resonance angle were found. Then, the full-width-half-maximum (FWHM), the sensitivity and the FOM of the bimetallic film SPR sensors with optimum thicknesses were investigated. The results indicated that with increasing thickness of the silver film (or with decreasing thickness of the gold film) in the bimetallic film, the sensitivity and FHWM of the bimetallic film SPR sensor with optimum thickness both decreased, but the FOM increased. When the thickness of the gold film in a bimetallic film was decreased to0 nm, the SPR sensor afforded the highest FOM (96.35 RIU-1 ). |
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| Keywords: | surface plasmon resonance sensor bimetallic film figure of merit |
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