Abstract
Plasmon-induced transparency (PIT) and plasmon-induced reflectance (PIR) are explored in a patterned graphene metamaterial using finite-difference time-domain numerical simulations and coupled-mode-theory calculations, and both PIT and PIR phenomena can be tailored dynamically by adjusting the Fermi level of graphene. Surprisingly, the group index of the proposed structure can be increased abruptly to 630, indicating ultraslow light can be achieved. Furthermore, the reflectance of the PIR can reach 70%. Therefore, the proposed structure provides a solid foundation for the realization of excellent slow-light devices, reflectors, and modulators.
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