Application of multimode coupling in electromagnetic characteristics of electromagnetically induced transparency
In order to realize the phenomenon of electromagnetically induced transparency,an electromagnetically induced transparency structure with bright bright mode coupling based on metamaterial and simultaneously excited by magnetic field was designed.The structure consists of double U-shaped rings and double circular rings.By changing the geometric parameters of these two types of constructions,resonance phenomena were achieved at specific frequencies.In addition,electronically controlled electromagnetically induced transparent structures based on silicon based semiconductors and Graphene were also analyzed.Further model analysis results show that when the coupling distance S=6.5 mm,there is a narrow transparent window in the transmission spectrum of the double U-shaped ring and the double circular ring that appears within a wide frequency range.At the same time,the experiments of electronically controlled electromagnetically induced transparent structures show that the transmission characteristics of metamaterial can be effectively controlled by adjusting the Fermi level.When the Fermi level is rised to 0.5 eV,the intensity of the transmission peak decreases to 59％.These results provide a new theoretical basis and technology roadmap for the design and control of electromagnetically induced transparent structures.
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