Wei Cui, Yixuan Wang, Zhihui He, Hui He,
https://www.sciencedirect.com/science/article/pii/S2211379721004824
Exploring higher group index has great benefits in the application of plasmonic slow-light devices. A hexagonal graphene coupled metasurface is proposed for realizing dual plasma induced transparency(dual-PIT) in terahertz through finite-difference time-domain (FDTD) method. The results show that dual-PIT can be effectively tuned by Fermi levels, carrier mobilities, and polarization angles. Moreover, the group index can be as high as ∼2553. These results may pave the way for the design of slow-light devices.
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