银纳米线复合结构光学性质研究
发布时间：2019-05-20 00:19
【摘要】：现代电子器件的小型化、精密化,使得亚波长量级上实现对信息的传输及处理成为新的难题。传统的光纤等光子器件能够高速传输信号,但是由于衍射极限的限制,其尺寸很难在纳米量级得到实现。金属纳米结构超材料因其能够在纳米尺度上实现对光的传导及操纵得到了广泛的重视。而超材料的许多新奇特性将使电子学和光子学更好地结合,在军事等多个领域均有重大的意义。本文的工作主要是从理论和实验上探究银纳米线复合结构的一些光学性质和应用。应用亥姆霍兹方程和相应的边界条件,建立x-y坐标系,推导得出了激发表面等离子体的各向同性介质和各向异性介质的波矢匹配条件;应用矩阵运算的方法,采用逐层传输的方式推导了复合结构介质中无限大平面间的反射和透射的表达式。根据银纳米线复合结构的反射和透射的推导结果,我们应用MATLAB模拟计算得到了三种复合结构:棱镜-银-空气结构、棱镜-银纳米线-空气结构和棱镜-银-银纳米线-空气结构的反射谱吸收峰等光学性质,如在某一范围的波长内吸收峰的位置和峰值大小的变化规律;对参数可以使反射率达到最大等进行了讨论和探究,并根据结果对结构进行理论上的优化。模拟计算了三种复合结构下,反射谱对于外层空气折射率微小变化的灵敏度,并进行参数上的优化和改进,这可以提高其对于材料外界折射率变化的灵敏度,对于探测和传感等领域具有重大意义。实验上分别用分光计法和几何测量法对银纳米线复合结构的玻璃基底进行了不平行度的测量;实验中使用P偏振光作为入射光,使其从玻璃一侧和纳米线一侧分别入射,根据测量的结果得到了一般的规律。在以白光为光源,波长范围为300 nm~800 nm条件下,探究了银纳米线复合结构的透射谱的特点,如吸收峰的数量,吸收峰的强度变化等。
[Abstract]:With the miniaturization and precision of modern electronic devices, it is a new problem to realize the transmission and processing of information in the sub-wavelength level. Traditional photonic devices such as optical fibers can transmit signals at high speed, but because of the limitation of diffraction limit, its size is difficult to be realized in nanometer scale. Metal nanostructured supermaterials have been paid more and more attention because of their ability to conduct and manipulate light on the nanometer scale. However, many novel properties of supermaterials will make electronics and photology better combined, and will be of great significance in many fields, such as military affairs. The main work of this paper is to explore some optical properties and applications of silver nanowires composite structure theoretically and experimentally. By using Helmholtz equation and the corresponding boundary conditions, the x 鈮，
本文编号：2481197
[Abstract]:With the miniaturization and precision of modern electronic devices, it is a new problem to realize the transmission and processing of information in the sub-wavelength level. Traditional photonic devices such as optical fibers can transmit signals at high speed, but because of the limitation of diffraction limit, its size is difficult to be realized in nanometer scale. Metal nanostructured supermaterials have been paid more and more attention because of their ability to conduct and manipulate light on the nanometer scale. However, many novel properties of supermaterials will make electronics and photology better combined, and will be of great significance in many fields, such as military affairs. The main work of this paper is to explore some optical properties and applications of silver nanowires composite structure theoretically and experimentally. By using Helmholtz equation and the corresponding boundary conditions, the x 鈮，
本文编号：2481197
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