基于表面等离激元干涉的金属微纳结构设计和光学特性研究
发布时间：2018-11-11 13:59
【摘要】：近年来,随着集成光学和微纳加工技术的不断发展,表面等离激元技术得到了研究者的广泛重视和关注。表面等离激元(Surface PlasmonPolaritons,简记为SPPs)是入射光波与金属表面的自由电子发生作用从而形成的一种电磁波模式,它凭借表面局域特性、波长短和超强透射的优势,为解决集成光学中突破衍射极限问题开辟了重要途径。在此背景下,本文设计并提出了两种基于表面等离激元干涉的金属微纳结构,并且通过模拟仿真探究了两种结构中光波的干涉效应和工作机理,具体包括:设计提出了一个基于非对称圆环结构的干涉型表面等离激元传感器,由一个非对称圆环-纳米小孔的金属结构组成,半圆环形凹槽分别对应两个不同臂长的干涉臂,从而构成双干涉臂、三光束干涉的传感结构。通过仿真得到不同臂长、凹槽数量的结构参数下干涉谱线变化的特性,并且探究了该结构的折射率传感能力。理论计算结果和仿真结果的基本吻合验证了非对称圆环中干涉效应和传感工作原理。该传感器结构简单、紧凑、可控,具有较高的对比度和较窄的线宽。在非对称圆环结构的基础上,设计了一种基于马增干涉的表面等离激元传感器,由一个金属-介质-金属多层膜上的半环狭缝-小孔结构构成。仿真计算了该结构的干涉谱线,探究了 SPP传播路径长度和中心层厚度对干涉谱的调控和影响原理。仿真结果显示了该结构的透过谱呈现宽带范围内的振荡行为,对应干涉相长和相消,验证了干涉效应的工作机理。基于这样的工作原理,继续探究并验证了该结构的折射率传感性能。另外,由于此结构的入射光在结构的背面入射,因此可以规避入射光对干涉结果的影响。同样,仿真结果显示了该结构在简单经济,高效紧凑的生化传感领域有着一定的参考价值和潜在应用。
[Abstract]:In recent years, with the continuous development of integrated optics and micro-nano fabrication technology, surface isophosphorization technology has received extensive attention and attention of researchers. (Surface PlasmonPolaritons,) is a kind of electromagnetic wave mode formed by the interaction of incident light wave with free electron on metal surface. It depends on the advantages of local characteristic of surface, short wavelength and super strong transmission. It opens up an important way to solve the problem of breaking the diffraction limit in integrated optics. In this context, two kinds of metal micro / nano structures based on surface isopultionic interference are designed and proposed, and the interference effect and working mechanism of the two structures are studied by simulation. The main contents are as follows: an interferometric surface isolator sensor based on asymmetric ring structure is proposed. The sensor is composed of a metal structure with an asymmetric ring and a nanometer hole. The semicircular ring groove corresponds to two interference arms with different arm lengths respectively. Thus, the sensing structure of double interference arm and three beam interference is formed. The characteristics of interference spectral line variation under different arm length and number of grooves are obtained by simulation, and the refractive index sensing ability of the structure is explored. The theoretical results are in good agreement with the simulation results. The interference effect and sensing principle in the asymmetric ring are verified. The sensor has simple structure, compact, controllable, high contrast and narrow linewidth. Based on the asymmetric ring structure, a kind of surface isopultiplexer sensor based on the Mazen interference is designed, which is composed of a half-ring slit and small hole structure on a metal-dielectric metal multilayer film. The interference spectrum line of the structure is simulated and the influence principle of the length of the SPP propagation path and the thickness of the center layer on the interference spectrum is discussed. The simulation results show that the transmission spectrum of the structure exhibits oscillatory behavior in the wideband range corresponding to the length and cancellation of the interference phase and verifies the working mechanism of the interference effect. Based on this principle, the refractive index sensing performance of the structure is investigated and verified. In addition, because the incident light of the structure is incident on the back of the structure, the influence of the incident light on the interference result can be avoided. The simulation results show that the structure has a certain reference value and potential application in the field of simple, economical, efficient and compact biochemical sensing.
【学位授予单位】：南京师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212
本文编号：2325037
[Abstract]:In recent years, with the continuous development of integrated optics and micro-nano fabrication technology, surface isophosphorization technology has received extensive attention and attention of researchers. (Surface PlasmonPolaritons,) is a kind of electromagnetic wave mode formed by the interaction of incident light wave with free electron on metal surface. It depends on the advantages of local characteristic of surface, short wavelength and super strong transmission. It opens up an important way to solve the problem of breaking the diffraction limit in integrated optics. In this context, two kinds of metal micro / nano structures based on surface isopultionic interference are designed and proposed, and the interference effect and working mechanism of the two structures are studied by simulation. The main contents are as follows: an interferometric surface isolator sensor based on asymmetric ring structure is proposed. The sensor is composed of a metal structure with an asymmetric ring and a nanometer hole. The semicircular ring groove corresponds to two interference arms with different arm lengths respectively. Thus, the sensing structure of double interference arm and three beam interference is formed. The characteristics of interference spectral line variation under different arm length and number of grooves are obtained by simulation, and the refractive index sensing ability of the structure is explored. The theoretical results are in good agreement with the simulation results. The interference effect and sensing principle in the asymmetric ring are verified. The sensor has simple structure, compact, controllable, high contrast and narrow linewidth. Based on the asymmetric ring structure, a kind of surface isopultiplexer sensor based on the Mazen interference is designed, which is composed of a half-ring slit and small hole structure on a metal-dielectric metal multilayer film. The interference spectrum line of the structure is simulated and the influence principle of the length of the SPP propagation path and the thickness of the center layer on the interference spectrum is discussed. The simulation results show that the transmission spectrum of the structure exhibits oscillatory behavior in the wideband range corresponding to the length and cancellation of the interference phase and verifies the working mechanism of the interference effect. Based on this principle, the refractive index sensing performance of the structure is investigated and verified. In addition, because the incident light of the structure is incident on the back of the structure, the influence of the incident light on the interference result can be avoided. The simulation results show that the structure has a certain reference value and potential application in the field of simple, economical, efficient and compact biochemical sensing.
【学位授予单位】：南京师范大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212
【参考文献】
相关博士学位论文 前1条
1 陆华;金属纳米腔耦合波导的光学特性及光子器件研究[D];中国科学院研究生院（西安光学精密机械研究所）;2013年
，本文编号：2325037
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