非线性的层状手性波导中表面等离激元的特性研究

发布时间：2018-04-17 19:37

本文选题：Kerr非线性 + 手性介质　；参考：《哈尔滨工业大学》2017年硕士论文

【摘要】：近些年来,随着电子器件向更加复杂化和高度集成化的发展,电子学似乎遇到了一个由于尺寸限制引起的瓶颈。器件集成转变为光子集成成为了重要趋势。为了达到光子线路的小型化和高度集成,人们进行了许多尝试并最终找到了一个利用表面等离激元(SPPs)的解决方案。SPPs可以提供一些迷人的效应,诸如场局域化效应,即表面附近的场被局限在一个很小的区域里,离开界面向外场是指数衰减的,它可以突破光的衍射极限。同时SPPs能够增强表面的非线性效应。目前许多SPPs方面的研究工作主要基于由金属和非手性介质构成的界面,而在本文中我们的讨论将限制在由金属与手性介质形成的Kerr非线性界面的情况。本文对金属介电手性介质构成的(MC型)单一界面的SPPs非线性特性进行研究。基于麦克斯韦方程、本构关系,电磁场间的关系通过F场方法被建立了起来,得到了MC型波导以及三明治型的波导(MCM型和CMC型)的非线性色散关系;给出了相应情况的等分量与不等分量情况下电磁场分布,分析了其中场的振荡频率与非线性系数的关系,估计了发生波动的临界点。画出了MC结构和MCM结构中的色散关系曲线,揭示了非线性和手性对色散关系的影响。用Stokes参量描述了场的偏振状态。通过能量分布图像的对比展示了界面附近手性介质内的非线性系数与手性的相互作用。给出了非线性和手性对SPPs传播距离的影响。
[Abstract]:In recent years, with the development of electronic devices to become more complex and highly integrated, electronics seems to meet a bottleneck caused by size constraints.The conversion of device integration to photon integration has become an important trend.In order to achieve the miniaturization and high integration of photonic circuits, many attempts have been made and finally a solution using surface isophosphors SPPs.SPPs can provide some fascinating effects, such as field localization effects.In other words, the field near the surface is confined to a very small region, and it attenuates exponentially from the interface to the external field, which can break through the diffraction limit of light.At the same time, SPPs can enhance the nonlinear effect of the surface.At present, many researches on SPPs are mainly based on the interface composed of metal and non-chiral media. In this paper, we will limit our discussion to the case of Kerr nonlinear interface formed by metal and chiral medium.In this paper, the SPPs nonlinearity of a single interface composed of a metal dielectric chiral medium is investigated.Based on Maxwell equation, constitutive relation and electromagnetic field, the nonlinear dispersion relations of MC waveguide, sandwich waveguide MCM and CMC type are obtained by F field method.The distribution of electromagnetic field in the case of equal and unequal components is given. The relation between the oscillation frequency of the field and the nonlinear coefficient is analyzed, and the critical point of the wave is estimated.The dispersion relation curves of MC and MCM structures are drawn, and the influence of nonlinearity and chirality on the dispersion relationship is revealed.The polarization state of the field is described by Stokes parameter.The comparison of energy distribution images shows the interaction between the nonlinear coefficient and chirality in chiral media near the interface.The effects of nonlinearity and chirality on the propagation distance of SPPs are given.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN814

【参考文献】