Abstract
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.
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Funding
This work was supported by the Natural Science Foundation of Chongqing City under Grant cstc2016jcyjA0581, by the Postdoctoral Science Foundation of China under Grant 2016M590875, by the Fundamental Research Funds for the Central Universities under Grant XDJK2018B012.
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Yiyuan Xie contributed to conceptualization, supervision and writing—review. Junxiong Chai provided methodology and software and performed writing—original draft, and writing—editing. Yichen Ye, Tingting Song, Bocheng Liu, Liangyi Zhang, Yunchao Zhu and Yong Liu performed writing—review.
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Xie, Y., Chai, J., Ye, Y. et al. A Tunable Slow Light Device with Multiple Channels Based on Plasmon-Induced Transparency. Plasmonics 16, 1809–1816 (2021). https://doi.org/10.1007/s11468-020-01367-5
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DOI: https://doi.org/10.1007/s11468-020-01367-5