共线光外差干涉系统及其在相位调制SPR传感技术中的应用

发布时间：2018-01-17 17:36

本文关键词：共线光外差干涉系统及其在相位调制SPR传感技术中的应用　出处：《中北大学》2017年博士论文　论文类型：学位论文

【摘要】：相位调制表面等离子体共振传感技术,是当前国内外生化、医药等领域的研究热点。结合光外差检测技术测量灵敏度高和表面等离子体共振时p光的相位发生突变而s光的相位基本不变的特性,构建了共线激光外差干涉系统。本文研究的目的是利用共线激光外差干涉系统和Kretschmann结构的传感装置,搭建高灵敏度相位调制表面等离子体共振传感器,研究同时测量相位和古斯-汉欣位移的方法,通过测量相位或古斯-汉欣位移,感知样品折射率的微小变化。这些工作,对研究相位变化与古斯-汉欣位移增强的相关性具有重要的理论意义,对优化和改进现有的相位调制表面等离子体共振传感检测方法以及设计微纳米级波导型光学器件具有实际应用价值。主要研究内容有:(1)以光的电磁理论为基础,讨论了光的偏振态、全反射特性和表面等离子体共振传感理论,包括倏逝波、古斯-汉欣位移及其与偏振态的关系、衰减全反射、光在金属中的传输特性、表面等离子体共振产生条件和Kretschmann结构;(2)分析了光的偏振显示及其在椭圆偏光测量中的应用,包括偏振显示原理、偏振方向显示实验和椭圆偏光测量实验;(3)阐述了弹光效应、弹光系数、声光衍射、正常和异常布拉格衍射以及声光调制器的基本结构及工作原理,研究了声光调制器驱动源数字线性电压控制技术,测量了驱动电压和1级衍射光功率;(4)构建了布拉格衍射实验系统,研究了钼酸铅声光调制器的幅度特性、频率特性、偏振特性以及衍射特性(衍射级次间互影响及频移漂移特性),分析了声光调制器的光强调制以及光束漂移对激光外差测量系统相位特性的影响,基于此,构建了双声光调制器共线激光外差测量系统,对其相位特性以及索列尔-巴比涅补偿器的标定方法进行了实验研究;(5)利用Kretschmann结构,研究了表面等离子体共振技术增强古斯-汉欣位移的特性,利用棱镜波导结构对古斯-汉欣位移进行了模拟研究,构建了共线激光外差相位调制表面等离子体共振传感实验系统,完成了相位测量实验。在此基础上,研究了同时测量相位和古斯-汉欣位移的方法。其主要创新点有:(1)制作了具有256级灰度线性声光调制器驱动电源(包括声光调制器驱动电源、微处理器、电子模拟开关和线性电压补偿技术),改善了驱动电源的线性度;(2)将双声光调制技术和偏振分光技术融合在一起,研究了拍频为“中频差”的单束正交线偏光产生系统,构建了共线激光外差测量系统,对其相位特性以及索列尔-巴比涅补偿器的标定进行了实验研究;(3)研究了棱镜底角为共振角附近某一角度的Kretschmann结构,完成了棱镜波导结构古斯-汉欣位移模拟研究;(4)研究了偏振可视的椭圆偏光测量系统,为构建基于CCD的表面等离子体共振相位椭圆偏振法测量系统提供了一种新思路;(5)研究了同时测量相位和古斯-汉欣位移的方法,该方法对优化和改进现有的相位调制表面等离子体共振传感检测方法,具有积极作用。
[Abstract]:Phase modulation surface plasmon resonance sensing technology, is the current domestic and international research hotspot in biochemistry, medicine and other fields. With the sensitivity of the optical heterodyne detection technique for measuring high and surface plasmon resonance phase P light mutation and phase s light invariant characteristics, constructed collinear laser heterodyne interferometer system. The purpose of this study is. By means of collinear laser heterodyne interferometer and Kretschmann structure, build a high phase modulation sensitivity of surface plasmon resonance sensor, method for simultaneous measurement of phase and GHS research, through measuring the phase or GHS, small changes in the refractive index sensing. This work has important theoretical significance to study the correlation of phase change with the enhancement of the GHS, to optimize and improve the existing phase modulation surface plasmon resonance sensor The detection method and the design of micro nano optical waveguide device has practical application value. The main contents are: (1) based on the electromagnetic theory of light as the foundation, discussed the polarization of light, the reflection properties and surface plasmon resonance sensing theory, including evanescent wave, GHS and its relationship with polarization, attenuated total reflection, optical transmission characteristics in metal, surface plasmon resonance condition and Kretschmann structure; (2) analysis of the polarization of light display and its application in ellipsometry measurements, including polarization display principle, display experiment and ellipsometry measurement of polarization direction; (3) describes the photoelastic effect. The photoelastic coefficient, diffraction, normal and abnormal Prague diffraction as well as the basic structure and working principle of acousto-optic modulator, the acousto-optic modulator driver digital linear voltage control technology, electric measurement The pressure and the 1 level diffraction optical power; (4) constructed the Prague diffraction experiment system, study the amplitude of lead molybdate acousto-optic modulator frequency, polarization and diffraction characteristics (diffraction mutual influence and frequency drift characteristics), analysis of the acousto-optic modulator for light beam drift and emphasize the effects of phase the characteristics of laser heterodyne measurement system based on this, the construction of two light modulator collinear laser heterodyne measurement system, the calibration method of the phase characteristic and - Soleil Babinet compensator was studied; (5) the use of Kretschmann structure, studied the technology of surface plasmon resonance enhancement properties of GHS, the GHS of a simulation study using prism waveguide structure constructed collinear laser heterodyne phase modulation surface plasmon resonance sensing experiment system, the phase measurement experiment to the end. On this basis, the research method for simultaneous measurement of phase and GHS. Its main innovations are: (1) produced a 256 gray level linear acousto-optic modulator driver (including acousto-optic modulator driver, microprocessor, electronic analog switch and linear voltage compensation technique), improve the linearity of the driving power supply; (2) the two optical modulation and polarization splitting technology together, on the beat for "single beam orthogonal linear polarized frequency difference" generation system, construct the collinear laser heterodyne measurement system, the calibration of the phase - and Soleil Babinet compensator was studied; (3) study the base angle of the prism structure is Kretschmann near the resonance angle at an angle, the simulation research of prism waveguide GHS; (4) on the elliptical polarization measurement system is constructed based on visual polarization, CC Provides a new method of surface plasmon resonance phase elliptical polarization measurement system D; (5) to study the method for simultaneous measurements of phase and GHS, the method of optimization and improvement phase modulation surface plasmon resonance sensor and the existing detection methods, it has the positive effect.

【学位授予单位】：中北大学
【学位级别】：博士
【学位授予年份】：2017
【分类号】：TN249;TP212

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