Abstract-Liquid crystal control of the plasmon resonances at terahertz frequencies in graphene micro-ribbon gratings

V. Yu. Reshetnyak, V. I. Zadorozhnii, I. P. Pinkevych, and D. R. Evans

https://journals.aps.org/pre/accepted/ff07aRc2P021f21fd71f4827a5937e8a3fd055a3f

We theoretically studied influence of the LC orientational state on the absorption, reflection, and transmission spectra of a graphene micro-ribbon grating placed between a nematic LC and an isotropic dielectric substrate. We calculated the absorption, reflection, and transmission coefficients at normal incidence of a far-infrared TM-wave (THz) and show that control of the orientational state of the LC layer enables the manipulation of the magnitude of the absorption/reflection maxima. The influence the LC orientational state on the plasmonic resonance increases with an increase of the isotropic substrate dielectric constant and the graphene micro-ribbon width to grating spacing ratio.