title: Transverse-electric plasmonic modes of cylindrical graphene-based waveguide at near-infrared and visible frequencies.
abstract: Transverse-electric (TE) surface plasmons (SPs) are very unusual for plasmonics phenomenon. Graphene proposes a unique possibility to observe these plasmons. Due to transverse motion of carriers, TE SPs speed is usually close to bulk light one. In this work we discuss conditions of TE SPs propagation in cylindrical graphene-based waveguides. We found that the negativity of graphene conductivity's imaginary part is not a sufficient condition. The structure supports TE SPs when the core radius of waveguide is larger than the critical value Rcr. Critical radius depends on the light frequency and the difference of permittivities inside and outside the waveguide. Minimum value of Rcr is comparable with the wavelength of volume wave and corresponds to interband carriers transition in graphene. We predict that use of multilayer graphene will lead to decrease of critical radius. TE SPs speed may differ more significantly from bulk light one in case of epsilon-near-zero core and shell of the waveguide. Results may open the door for practical applications of TE SPs in optics, including telecommunications.
authors.affiliation: Chelyabinsk State University, Department of Radio-Physics and Electronics Chelyabinsk, 454001, Russian Federation.|South Ural State University (National Research University), Chelyabinsk, 454080, Russian Federation.
authors.forename: Dmitry A
authors.initials: DA
authors.lastname: Kuzmin
authors.affiliation: Chelyabinsk State University, Department of Radio-Physics and Electronics Chelyabinsk, 454001, Russian Federation.|South Ural State University (National Research University), Chelyabinsk, 454080, Russian Federation.
authors.forename: Igor V
authors.initials: IV
authors.lastname: Bychkov
authors.affiliation: Kotelnikov Institute of Radio-engeneering and Electronics of RAS, Laboratory of magnetic phenomena in microelectronics, Moscow, 125009, Russian Federation.
authors.forename: Vladimir G
authors.initials: VG
authors.lastname: Shavrov
authors.affiliation: Syktyvkar State University named after Pitirim Sorokin, Syktyvkar, 167001, Russian Federation.
authors.forename: Leonid N
authors.initials: LN
authors.lastname: Kotov