Evanescent tunneling of an effective surface plasmon excited by convection electrons.
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.
Shin
Young-Min
YM
Department of Physics and Astronomy, Seoul National University, Seoul, Korea.
So
Jin-Kyu
JK
Jang
Kyu-Ha
KH
Won
Jong-Hyo
JH
Srivastava
Anurag
A
Park
Gun-Sik
GS