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We examine the unusual dispersion and attenuation of transverseelectromagnetic waves in the few-THz regime on nanoscale graphene and coppertransmission lines. Conventionally, such propagation has been considered to behighly dispersive, due to the RC-constant-driven voltage diffusion below 1THzand plasmonic effects at higher frequencies. Our numerical modelling betweenthe microwave and optical regimes reveals that conductor kinetic inductancecreates an ultra-broadband LC region. This resultant frequency-independentattenuation is an ideal characteristic that is known to be non-existent inmacro-scale transmission lines. The kinetic-LC frequency range is dictated bythe structural dimensionality and the free-carrier scattering rate of theconductor material. Moreover, up to 40x wavelength reduction is observed ingraphene transmission lines.

Kinetic inductance driven nanoscale 2D and 3D THz transmission lines