title: Evanescent tunneling of an effective surface plasmon excited by convection electrons.
abstract: We introduce the subwavelength transmission of an effective surface plasmon beyond the light zone via the proximity interaction of convection electrons with a metal grating. A comparative analysis of dielectric homogenization and a finite-difference-time-domain simulation shows that out-of-phase-like modes (pi modes) have strong transmission below the cutoff frequency relying on the parametric condition of structural dimension and electronic energy. The synchronous spatial field and charge distribution of the pi mode system confirms the evanescent tunneling effect of the electron-coupled plasmons.
authors.affiliation: Department of Physics and Astronomy, Seoul National University, Seoul, Korea.
authors.forename: Young-Min
authors.initials: YM
authors.lastname: Shin
authors.forename: Jin-Kyu
authors.initials: JK
authors.lastname: So
authors.forename: Kyu-Ha
authors.initials: KH
authors.lastname: Jang
authors.forename: Jong-Hyo
authors.initials: JH
authors.lastname: Won
authors.forename: Anurag
authors.initials: A
authors.lastname: Srivastava
authors.forename: Gun-Sik
authors.initials: GS
authors.lastname: Park