Study on Subwavelength Transmission Properties of Triangular-Shaped Graphene-Coated Nanowires on Substrate

Study on properties of plasmonic waveguide of graphene-coated nanotube with a dielectric substrate

“…In the case of the same propagation length, the normalized mold area of the waveguide proposed in this paper is two orders of magnitude smaller than that of the graphene-coated nanowire waveguide with the dielectric substrate(~10 −5 ) [40]. And the normalized mold area of the waveguide proposed is one order of magnitude smaller than that of the triangular-shaped graphene-coated nanowires on substrate(~10 −6 ) [41].…”

“…Among them, the hybrid waveguide has a better tradeoff between strong eld con nement and low propagation loss, which has been widely studied in recent years. The graphene-coated nanowire waveguide [37][38][39][40][41][42][43][44] is a research hotspot in hybrid waveguides because of its simple structure, easy fabrication and no cut-off of fundamental mode. It has been shown that the graphene-coated nanowire waveguide has stronger eld con nement than the metal nanowire waveguide, and the normalized mode area is about 10 −3 [37].…”

“…It has been shown that the graphene-coated nanowire waveguide has stronger eld con nement than the metal nanowire waveguide, and the normalized mode area is about 10 −3 [37]. In order to further improve the eld con nement and reduce the mode propagation loss, researchers have proposed a graphene-based cylindrical hybrid waveguide [38][39] and the graphene-coated nanowire waveguide with dielectric substrate [40][41][42]. In reference [38], although the normalized mode area of the graphene-based cylindrical waveguide is reduced to 10 −6 , the propagation distance is less than 2um.…”