光纤端的等离激元探测技术  

Plasmonic Sensingon Fiber Tip

作　　者：杨天 陈成 王晓丹 周鑫 雷泽雨 Yang Tian;Chen Cheng;Wang Xiaodan;Zhou Xin;Lei Zeyu(State Key Laboratory of Regional Optical Fiber Communication Network and New Optical Communication System,School of Electronic Information and Elecrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学电子信息与电气工程学院区域光纤通信网与新型光通信系统国家重点实验室

出　　处：《激光与光电子学进展》2019年第20期41-58,共18页Laser & Optoelectronics Progress

基　　金：国家自然科学基金（61275168,11574207,61975253）;上海市自然科学基金（18ZR1421600）;上海交通大学医工交叉研究基金（ZH2018ZDA38,YG2016MS83)

摘　　要：尝试对两类典型的光纤端集成等离激元探测技术的发展进行回顾与梳理,并结合作者的科研实践对本领域未来工作的重点和潜在价值进行讨论。第一类技术是在光纤的端平面集成等离激元谐振传感结构,尤其是等离激元微腔。这种器件既能够插进微量样品通过dip-and-read方式进行生物分子传感,也能够伸入狭小的空间进行超声内窥探测。未来,如何在秉持方便、快速核心价值的基础上,解决复杂样品中低含量分子检测的难题,是这类器件进入医学诊断和食品检验应用领域的关键;而如何大幅提高表面等离激元谐振传感器对声信号的灵敏度,是实现具有重要应用价值的光纤表面等离激元谐振水听器阵列的关键。第二类技术是在锥形光纤尖端集成等离激元天线探针。结合各种扫描探针显微技术,这种器件提供了对等离激元天线的高精度动态调控能力,及通过等离激元热点与样品的强烈作用进行高分辨扫描成像的能力。未来,通过对天线探针和可测量物理量的创新研究,有望进一步扩展可表征物理和化学现象的范围,显著提升表征性能。In this paper,we attempt to review and sort out the development of two typical types of plasmonicsensing-on-fiber-tip technologies,and discuss the focus for future work and potential values for application.The first type is surface plasmon resonance(SPR)sensing structures,especially surface plasmon cavities,integrated on optical fiber end-facets.They can be applied to small volumes of samples and achieve biomolecule sensing in a dipand-read manner.They can also be inserted into narrow spaces for ultrasound endoscopy.In the future,how to solve the problem of low content detection in complex crude samples while upholding the core values of convenience and rapidness,is the critical challenge for fiber SPR sensor development in order to find real application values in medical diagnosis and agriculture product inspection.On the other hand,to greatly improve SPR devices′sensitivities to acoustic signals is the key to achieving fiber SPR hydrophone arrays with high application values.The second type is plasmonic antennas integrated on tapered optical fibers′apexes.Combined with scanning probe microscopy technologies,these probe devices render high precision and dynamic tuning of plasmonic antennas,and high resolution scanning microscopy by using plasmonic hotspots to strongly interact with and map the samples.In the future,through innovative research on the antenna probes and the to-be-measured quantities,the scope of physical and chemical phenomena that can be characterized is expected to be further expanded,and the characterization performance is expected to significantly improve.

关 键 词：表面光学 等离激元微腔 等离激元天线 光纤集成 生物传感 水听器 扫描探针显微技术 

分 类 号：O539[理学—等离子体物理]