Slow light devices with buffering capability play a critical role in all-optical signal processing. In this paper, multiple slow light phenomena are implemented based on plasmon-induced transparency (PIT) in our device. The device mainly consists of dual tooth cavities coupled with stub resonators, respectively. Temporal coupled-mode theory model illustrates that the triple PIT phenomena can be achieved based on different formation mechanisms. The simulation results calculated by the finite-difference time-domain method reveal that significant slow light response occurs at two wavelength regions. In addition, the parameters of structure have an important influence on PIT response and slow light characteristics. Moreover, the separate manipulation of wavelength, transmission and group index at transparency peak can be achieved in different slow light channels by adjusting the structural parameters. This plasmonic device is of great significance for the design of optical networks on chips.

具有缓冲功能的慢光设备在全光信号处理中起着至关重要的作用。在本文中，在我们的设备中基于等离激元诱导的透明性（PIT）实现了多种慢光现象。该设备主要由分别与短截谐振器耦合的双齿腔组成。时间耦合模式理论模型表明，基于不同的形成机理可以实现三重PIT现象。通过时域有限差分法计算的仿真结果表明，在两个波长区域都出现了明显的慢光响应。另外，结构参数对PIT响应和慢光特性有重要影响。而且，单独控制波长 通过调节结构参数，可以在不同的慢光通道中实现透射峰和透明峰处的基团指数。这种等离激元器件对于芯片上光网络的设计具有重要意义。