Fig. 6From: Enhanced Confinement of Terahertz Surface Plasmon Polaritons in Bulk Dirac Semimetal-Insulator-Metal WaveguidesTransmission spectra for different gap width g (a) and Fermi energy EF (b), where the other parameters are same as Fig. 4b. Dependence of Re(neff) (c) and Im(neff) (d) on the Fermi energy EF and gap width gBack to article page