Performance Analysis of a Kretschmann-Based Ag-ITO-Au Surface Plasmon Resonance Sensor through Numerical Simulations

IF 1.8 4区物理与天体物理 Q3 OPTICS

International Journal of Optics Pub Date : 2021-12-22 DOI:10.1155/2021/9975877

Liang Zhang, Jianan He, Tao Li, Xiaocong Wu, D. Gu, Sixiang Zhang, Ying Ye

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Abstract

Variations of a Kretschmann-structure-based Ag-indium tin oxide- (ITO-) Au surface plasmon resonance (SPR) sensor were explored to improve its sensitivity. The sensor structure was optimised, and its characteristics were studied through numerical simulations. The chip structure that comprised 20 nm Ag/30 nm ITO/10 nm Au yielded the best sensing performance, wherein the angular sensitivity could reach 197.6° RIU−1 and the figure of merit was 43.4 RIU−1. These performance parameters are nearly three times higher than those of Ag/Au bimetallic resonance sensors. Furthermore, an adhesive Cr layer and two-dimensional graphene were incorporated into this sensor structure to explore their impact on the performance. The results demonstrated that the Cr layer significantly weakened the sensor performance, whereas graphene did not produce the expected enhancement effect on this structure. If simply adding a layer to a Au/Ag sensor can produce a three-fold improvement in its performance, then its economic and scientific benefits are potentially significant and widespread.

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Kretschmann基Ag-ITO-Au表面等离子体共振传感器性能的数值模拟分析

研究了基于kretschmann结构的ag -铟氧化锡(ITO-) Au表面等离子体共振(SPR)传感器的变化，以提高其灵敏度。对传感器结构进行了优化，并对其特性进行了数值模拟研究。由20 nm Ag/30 nm ITO/10 nm Au组成的芯片结构具有最佳的传感性能，其角灵敏度可达197.6°RIU−1，优值为43.4 RIU−1。这些性能参数比银/金双金属谐振传感器高近3倍。此外，在该传感器结构中加入了粘附Cr层和二维石墨烯，以探索它们对性能的影响。结果表明，Cr层显著削弱了传感器的性能，而石墨烯并没有对该结构产生预期的增强效果。如果简单地在Au/Ag传感器上添加一层可以使其性能提高三倍，那么它的经济和科学效益是潜在的显著和广泛的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Optics Physics and Astronomy-Atomic and Molecular Physics, and Optics

CiteScore

3.40

自引率

5.90%

发文量

审稿时长

13 weeks

期刊介绍： International Journal of Optics publishes papers on the nature of light, its properties and behaviours, and its interaction with matter. The journal considers both fundamental and highly applied studies, especially those that promise technological solutions for the next generation of systems and devices. As well as original research, International Journal of Optics also publishes focused review articles that examine the state of the art, identify emerging trends, and suggest future directions for developing fields.