基于双短腔耦合系统等离激元诱导吸收效应及多开关功能应用  

Plasmon-Induced Absorption Based on Double-Stub Resonator and Its Application for Multi-Switching

作　　者：胡金凤[1] 刘娟[1] 刘彬[1] 陈佳[2] 梁红勤 廖云程 蔡旭辉 Hu Jinfeng1, Liu Juan1, Liu Bin1, Chen Jia1, Liang Hongqin1, Liao Yuncheng1, Cai Xuhui1(1Jiangxi Engineering Laboratory for Optoelectronics Testing Technology, Nanchang Hangkong University Nanchang, Jiangxi 330063, China; 2 School of Mechanical and Vehicular Engineering, Nanchang Institute of Science ＆ Technology Nanchang, Jiangxi 330108, China)

机构地区：[1]南昌航空大学江西省光电检测技术工程实验室,江西南昌330063 [2]南昌工学院机械与车辆工程学院,江西南昌330108

出　　处：《激光与光电子学进展》2018年第10期306-313,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61665007);江西省自然科学基金(20161BAB202039);南昌航空大学研究生创新专项资金项目(YC2017044)

摘　　要：提出了一种基于金属-绝缘体-金属(MIM)表面等离激元波导的双短腔共振系统(DSR),通过双短腔腔模之间的相互干涉,实现了表面等离激元诱导吸收(PIA)效应。利用时域有限差分(FDTD)方法对其传输特性进行了数值仿真分析。对相位响应特性进行仿真分析,发现PIA窗口会出现明显的反常色散现象,该反常色散效应可应用于实现表面等离激元波导中的快光效应。另外,还提出一种基于PIA效应的多开关功能应用,并通过仿真分析了短腔腔长和折射率变化对PIA窗口的影响,优化了开关功能的结构参数。具备这些特性的结构在表面等离激元光开关、滤波器等方面具有潜在的应用价值。We propose a douhle-stuh resonator （DSR） based on a metal-insulator-metal （MIM） surface plasmon waveguide. The plasmon-induced absorption （PIA） effect is achieved by mutual interference between the two stub cavity modes. The transmission properties of the system are numerically simulated by the finite-difference timedomain （FDTD） method. Anomalous dispersion phenomenon can be achieved with the PIA windows based on the simulation analysis of phase response characteristics. Such anomalous dispersion effect can be used for realizing fast light effect in surface plasmonic waveguide. In addition, a multi-switch function based on the PIA effect is proposed. By simulating the influence of the changes of stub cavityPs length and the refractive index on the PIA window, the structural parameters of the switch function are optimized. Structures with these characteristics have potential applications in surface plasmon optical switches and filters and so on.

关 键 词：等离激元诱导吸收 快光 光开关 时域有限差分法 

分 类 号：O539[理学—等离子体物理]