Fig. 9
From: Self-reactive impedance surfaces for enhanced quasi-line wave propagation in the terahertz spectrum
(a) Schematic of the proposed quasi-line wave waveguide consisting of adjacent graphene patches with a subwavelength gap. (b) Surface impedance of the graphene patch as a function of frequency, highlighting the transition between capacitive and inductive behaviors. (c) Electric field (E-field) distribution of the quasi-line mode when the graphene patch exhibits inductive impedance at f = 50 THz, demonstrating strong edge confinement. (d) E-field distribution when the graphene patch is capacitive at f = 3 THz, showing the inability of capacitive surfaces to support the quasi-line mode.
