Research on Surface Plasmon Resonance Sensing of Metal Nano hollow Elliptic Cylinder

IF 3.3 4区物理与天体物理 Q2 CHEMISTRY, PHYSICAL

Plasmonics Pub Date : 2023-07-24 DOI:10.1007/s11468-023-01930-w

Dandan Zhu, Lixin Kang, Kai Tong, Shancheng Yu, Jin-Guo Chai, Zhengtai Wang, LuLu Xu, Yuxuan Ren

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引用次数: 1

Abstract

In this article, a new three-dimensional multi-layered nanoscale elliptical cylinder structure-based surface plasmon resonance sensor is designed, which utilizes the finite difference time domain method and FDTD simulation software for numerical simulation. The top of the structure is an elliptical cylinder array attached to a gold film with nanoholes. The middle layer is a dielectric layer, which can restrict the electromagnetic field. The bottom layer is an Au film and Si substrate. Surface plasmon resonance is excited by a vertically incident plane wave structure, and the incident electromagnetic wave is coupled to local surface plasmon through gold nanoscale elliptical cylinders. By adjusting the relevant structural parameters, the structure’s resonance wavelength and resonance depth can be well adjusted. The optimized sensing structure has a smaller half-width than the traditional solid elliptical cylinder, higher sensitivity, and a larger quality factor. This structure can detect refractive indices in both gaseous and liquid environments, overcome the disadvantage of only being able to sense in a single environment, and provide a new approach for surface plasmon resonance sensing in biology and chemistry.

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金属纳米空心椭圆圆柱表面等离子体共振传感研究

本文设计了一种基于纳米椭圆圆柱结构的三维多层表面等离子体共振传感器，利用时域有限差分法和FDTD仿真软件进行了数值模拟。该结构的顶部是一个椭圆圆柱体阵列，连接在带有纳米孔的金膜上。中间层为介电层，可对电磁场起到限制作用。底层是金薄膜和硅衬底。表面等离子体共振由垂直入射的平面波结构激发，入射电磁波通过金纳米级椭圆圆柱体耦合到局部表面等离子体。通过调整相关结构参数，可以很好地调节结构的共振波长和共振深度。优化后的传感结构比传统的实心椭圆圆柱具有更小的半宽、更高的灵敏度和更大的品质因子。该结构可以在气体和液体环境中检测折射率，克服了只能在单一环境中检测的缺点，为生物和化学领域的表面等离子体共振传感提供了新的途径。

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

Plasmonics 工程技术-材料科学：综合

CiteScore

5.90

自引率

6.70%

发文量

164

审稿时长

2.1 months

期刊介绍： Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons. Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.