光子学报, 2016, 45 (12): 1228002, 网络出版: 2016-12-26  

基于Au/ITO纳米复合材料的自参照SPR传感器

Self-referenced SPR Sensor Based on Au/ITO Nanocomposite
作者单位
1 燕山大学 电气工程学院, 河北 秦皇岛 066004
2 东北大学秦皇岛分校 控制工程学院, 河北, 秦皇岛 066004
摘要
利用Au/ITO纳米复合材料设计了一种自参照表面等离子体共振传感器.该传感器产生的光谱有两个共振峰, 即共振峰1和共振峰2.共振峰1随着待测介质折射率和入射角的变化产生漂移, 而共振峰2仅随入射角的变化产生漂移, 两个共振峰相互参照, 降低了入射角偏移对测量结果的影响, 提高了测量的准确性.在纳米复合材料的4种不同体积分数下, 仿真分析了入射角、待测介质折射率和薄膜厚度变化对两个共振波长的影响.在入射角θ为80°, 且金的体积分数f为0.65, 薄膜厚度d为40 nm和45 nm, 或金的体积分数f为0.85, 薄膜厚度d为45 nm和50 nm时, 共振峰2不随待测介质折射率的变化而变化, 只有共振峰1随待测介质折射率的变化而变化, 达到自参照传感器的理想状态.
Abstract
A self-referenced dual mode surface plasmon resonance sensor based on Au/ITO nanocomposite material was designed. The proposed sensor can generate two resonance peaks namely resonance peak 1 and resonance peak 2. The results reveal that the resonance peak 1 has larger drifts with the changing of the refractive index of measured medium and the incident angle, but the resonance peak 2 drifts only with the change of incident angle. Two peaks are cross-referenced, and the influence of the incident angle shift on the measurement results is reduced, which improves the accuracy of the measurement results. We investigate the effect of the incident angle, refractive index of sensing medium and thickness of the thin film on two peak of wavelength with different volume fraction of nanocomposite materials. When the incident angle θ is 80°, the volume fraction of Au f is 0.65, film thickness d is 40nm and d is 45nm, and the volume fraction of Au f is 0.85, film thickness d is 45 nm and 50 nm, the resonance peak 2 does not vary with the change of the refractive index,only the resonance peak 1 varies with the change of the refractive index to achieve the desired state of self-referenced sensor.

李志全, 何家欢, 王亚娟, 冯丹丹, 顾而丹, 李文超. 基于Au/ITO纳米复合材料的自参照SPR传感器[J]. 光子学报, 2016, 45(12): 1228002. LI Zhi-quan, HE Jia-huan, WANG Ya-juan, FENG Dan-dan, GU Er-dan, LI Wen-chao. Self-referenced SPR Sensor Based on Au/ITO Nanocomposite[J]. ACTA PHOTONICA SINICA, 2016, 45(12): 1228002.

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