Theoretical analysis of metamaterial-gold auxiliary grating sensing structure for surface plasmon resonance sensing application based on polarization control method
Theoretical analysis of metamaterial-gold auxiliary grating sensing structure for surface plasmon resonance sensing application based on polarization control method
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DOI：
10.1016/j.optcom.2017.08.020
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发表时间：
2017-12
影响因子：
2.4
通讯作者：
Yi Sun;H. Cai;Xiao-ping Wang
中科院分区：
文献类型：
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作者：
Yi Sun;H. Cai;Xiao-ping Wang
提出了一种基于粒子群优化（PSO）算法设计的带辅助光栅的超材料-金多层膜传感结构，用于基于偏振控制方法的表面等离子体共振（SPR）传感系统。通过数值计算和仿真分析，发现超材料传感结构显著提高了SPR信号强度奇异性的灵敏度。超材料传感结构还增加了倏逝波的穿透深度，使其能够检测低分子量生物分子和较大的细胞，如细菌。设计了辅助光栅结构，用于识别强度奇异点两侧传感区域的折射率。研究了识别的稳定性和可见光区的电场强度。
A metamaterial-gold multilayer sensing structure designed using the particle swarm optimization (PSO) algorithm with an auxiliary grating is proposed for using in a surface plasmon resonance (SPR) sensor system based on the polarization control method. After numerical calculations and simulation analysis, it was found that the metamaterial sensing structure significantly improves the sensitivity of the SPR signal with intensity singularity. The metamaterial sensing structure also increases the penetration depth of evanescent wave, making it possible to detect low-molecular-weight biomolecules and larger cells such as bacteria. The auxiliary grating structure was designed to identify the refractive index of the sensing region on both sides of intensity singularity. The stability of recognition and the electric field intensity of the visible light band were also studied.