Tunable plasmon induced transparency with high transmittance in a two-layer graphene structure

• DOI: 10.1016/j.rinp.2021.104040
• Publication Date: 2021-03-11T07:44:49Z
• Authors: Shuquan Zheng; Qixiang Zhao; Ling Peng; Xing Jiang
• Keywords: Slow light; Plasma induced transparency; Physics; QC1-999; Metasurface; 02 engineering and technology; Graphene; 0210 nano-technology; 7. Clean energy

A dynamically tunable plasmon induced transparency planar structure with double layers hollow-cross graphene array is proposed in this paper. Due to energy oscillating back and forth between two weak hybridized states made up of upper and lower graphene, a transparent window during two resonance points is generated, and the PIT curve fits well with the Lorentz model. Via tuning the Fermi energy of graphene, a transparent window with the maximum transmissivity of 98.3% and modulation depth of 17.3% can be dynamically manipulated. In addition, the amplitude and frequency of the transmittance can be controlled by electrical doping without changing the structure. The structure provides a new scenario for innovative designs of plasmon-induced transparent structures. The proposed graphene-based PIT metamaterial shows promising applications of slow light technology, switchers, and filters in THz frequencies.