MIM波导结构中的等离激元诱导透明和慢光效应

Plasmon Induced Transparency and Slow Light Effect in MIM Waveguide

摘要:

基于金属/介质/金属(MIM)波导,提出了一种两侧含有双环、四环谐振腔的等离激元波导滤波结构,采用电磁仿真计算了其电磁传输特性,通过场分布分析了透射谱中通带和谷值产生的物理机理。仿真结果表明该结构可实现等离激元诱导透明(PIT),通过改变谐振腔的有效半径,可调节PIT窗口的位置、带宽和慢光效应。计算结果显示在双环和四环谐振结构的PIT窗口,可以实现0.148和0.358ps的信号延迟。这一特性在可调滤波器件、光存储器件和集成光子器件设计上具有潜在应用价值。

Abstract:

Based on the waveguide structure of metal-dielectric-metal (MIM), a kind of plasma waveguide filter with double-ring and four-ring resonators on both sides was proposed, and its transmission characteristics were calculated by electromagnetic simulations. The physical mechanism of the peak and valley generation in transmission spectrum was analyzed by electromagnetic field distributions. The results show that the structure can realize the plasmon induced transparency (PIT). By adjusting the effective radius of the resonator, the position, bandwidth and slow light effect of the PIT transparent window can be adjusted. The results show that the signal delay of 0.148 and 0.358ps can be realized in the PIT window of double ring and four ring resonant structures, respectively. This property will have potential applications in the design of tunable filter devices, optical memory devices and integrated photon devices.