【作者】 李鹏；

【导师】 刘树田； 赵海发；

【作者基本信息】 哈尔滨工业大学 ， 光学， 2006， 硕士

【摘要】 表面等离子共振(SPR)型传感器是一种结构简单,灵敏度高的新型测量仪器,它具有非破坏性、实时在线检测的特点,目前已经成为传感器领域的研究热点。表面等离子体共振传感器在生物学、医学、化学等领域获得了十分广泛的应用,越来越多的研究者开始致力于这一项目的研究。本课题主要研究了相位检测方法及相关的实验技术,研究如何能够更好的提高表面等离子共振传感器的检测灵敏度。首先,本文介绍了表面等离子型传感器的研究现状及发展方向,比较了不同类型表面等离子体共振检测方法的优点和局限。其次,我们从电磁学基本理论出发,描述了表面等离子波的特殊性质以及产生表面等离子波的激发结构。第三,采用Kretschmann激发方法对不同的激发层模型进行了模拟计算,分析了各种实验条件对于表面等离子体共振的影响。最后,我们对相位检测技术进行了讨论,相位的提取过程分为两步,先要获得一幅干涉图像,然后根据干涉图像的移动获取相位信息。基于共光路的平行偏振光干涉成像的方法,我们装配了表面等离子波干涉成像的实验装置,并利用CCD摄像机获得了干涉图像。再利用相关的程序,就可以获得相位信息。我们在实验上进行了对相位测量的研究,给出实验数据以及对实验结果的初步讨论。更多还原

【Abstract】 Surface plasmon resonance (SPR) sensors are new kinds of sensors with the advantages of simple structure and high sensitivity. They have the non-invasive nature and the capability of real-time monitoring and have recently attracted many attentions in the field of sensoring. SPR sensoring technologies have been widely used in various fields such as biology, medicine, chemistry, and so on. More and more researchers devote themselves to the studies of SPR technology and its applications.The article mainly concentrates on the study of SPR sensor with the phase detection method and its experimental implementing technique, the aim is to further improve the detection sensitivity of SPR sensor. The work has been done consists of four parts. Firstly, we review the current status and trends of the researches in SPR sensors and give the features and limitations of different schemes of SPR sensors. Secondly, on the basis of electromagnetic theory, we have described the characteristics of surface plasmon wave and its exciting configuration. In the third part, we numerically simulate the different excitation layer model by adopting Kretschmann type excitation. The effects of various experimental conditions on the SPR excitation have been discussed. In the last part, we have discussed the phase detection technique, the phase extraction process usually involves first capturing a set of interference fringes, then followed by converting the movement of the fringes into a phase quantity. we present a experimental setup which use a common optical path to generates the interference fringes, and use a CCD camera to capture the interference fringes. With the help of program, then the phase change can be extracted. We have experimentally performed the measurements of phases, the experimental data and the analyses have been given.更多还原