1- Department of Physics, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
Abstract: (2220 Views)
In the present study, a metamaterial-based plasmonic structure has been proposed, which supports two plasmonic modes. By combining these two bright and dark modes, the absorption can be greatly reduced and the speed of light slows down in the structure. The reduction of group velocity of order 278 in the structure. Also, at resonant frequency, the transmission rate reaches 98.44% by breaking the symmetry in the structure. By replacing graphene with gold and silver, its electrical conductivity can be used. A frequency transfer to the resonant range can be done by changing the voltage, so that we have covered a 8–18 THz range. Using the sensor property of the structure for materials with different refractive indices, the refractive index sensitivity measured 9.439 . In fact, the application of such a structure is for information storage, sensing, filters and switches.
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