Abstract

Design and analysis of a graphene-based suspended nanostrip line for integrated circuit applications at terahertz (THz) frequencies are presented. A suspended nanostrip waveguide structure has been analyzed using a full wave electromagnetic (EM) simulator to obtain its transmission line characteristics, such as propagation constant and characteristic impedance. Closed form expressions have been developed for the same. Later, graphene-based plasmonic resonators have been analyzed. Coupled resonators have been used to implement a filter-based diplexer. A split ring resonator has been used to design a sensor for measuring refractive index variation. The transmission spectra of the designed graphene-based SRR have been discussed in detail with the help of full-wave EM simulation tools, providing a vivid vision of the sensing potential of the proposed sensor structure. The simulation results depict two surface plasmon resonance peaks in the transmission spectrum, showing a linear relationship with the dielectric constant of the material under sensing. The tuning capability of the graphene tunable sensor allows its usage in the field of nanodevices and sensor applications.

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