自组装银纳米环等离激元生物传感器的制备与光学性质  

Preparation and Optical Properties of Self-Assembled Plasmonic Biosensor Based on Silver Nanoring

作　　者：曹瑷琛 倪海彬 倪波 李元元 常建华[1] Cao Aichen;Ni Haibin;Ni Bo;Li Yuanyuan;Chang Jianhua(College of Electronics and Information Engineering,Nanjing University of Information Science&Technology,Nanjing,Jiangsu 210044,China)

机构地区：[1]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《中国激光》2022年第3期152-162,共11页Chinese Journal of Lasers

基　　金：国家自然科学基金(61605082,61875089,11374161);中国博士后科学基金(2017M611654)。

摘　　要：在过去的十几年中,衍射耦合超窄共振已经发展成为一个独立的、快速扩展的研究领域。这种共振模式通常被称为表面晶格共振,具有体积小、易集成、低功耗等特点。设计了一种性能优异且可规模化生产的表面晶格共振折射率传感器。利用时域有限差分法进行了仿真,对结构的光学性能进行了研究。采用纳米球光刻技术以及纳米压印技术,制备出大面积、高质量的银纳米环阵列,结构的灵敏度为663 nm/RIU,品质因数为9.2。通过改变结构的几何参数,不仅能实现对共振波的调谐,同时还能提高折射率灵敏度。所提传感器在生物传感领域具有潜在的应用前景。Objective With the characteristics of low power consumption,high sensitivity,and easy integration,nanophotonic sensors have become important research targets in the fields of biological detection,food safety,and internet of things.Surface plasmon resonance(SPR)provides an effective way to control photons at the sub-wavelength scale and has been extensively studied in the field of nano-sensors.In the past decade,many excellent surface plasmon resonance-based sensing structures have been used to construct photoelectric sensors such as nanoscale arrays of holes,disks,rings,and so on.As a type of SPR,localized SPR(LSPR)shows the advantages of low cost and high sensitivity.However,the potential application of LSPR is hindered by radiation damping.Moreover,many metal micro-and nano-structured SPR devices are limited by the current laboratory applications such as electron beam printing,electron beam lithography,and other processing methods,which are difficult to commercialize.How to realize low-cost,large-scale preparation of high-performance nano sensors is a difficult point in current research.This paper proposes a surface lattice resonant refractive index sensor with an excellent performance and large-scale production.This resonance mode has the characteristic of narrowing the resonance wavelength linewidth to achieve an excellent and stable structural performance.In the aspect of simulation,the finite difference time domain method(FDTD)is used to study the optical performance of this structure.The experiment uses the nanosphere lithography and nanoimprint technologies to prepare large-area,high-quality silver nanoring arrays.The experimental results show that the sensitivity of the structure is 663 nm/RIU and the figure of merit(FoM)is 9.2.The change of structural geometric parameters can not only realize the tuning of resonance wavelengths,but also improve the refractive index sensitivity.Methods In this paper,the plane and 3D diagrams of the periodic silver nanoring array structure used for sensing are presented i

关 键 词：传感器 表面等离激元 纳米环型阵列 自组装 纳米压印 生物传感 

分 类 号：TN29[电子电信—物理电子学]