Generation of Bessel Surface Plasmon Polaritons in a Finite-Thickness Metal Film

Figure 3

The normalized real part of the longitudinal 𝐸^𝑙₁ (a) and radial 𝐸^𝜌₁ (b) components of the electric vector for low-index (1) and high-index (2) TM-polarized zero-order Bessel surface plasmon polaritons versus the distance inside the gold film of 50 nm thickness embedded in SF10 glass. The distance from the Bessel surface plasmon polariton axis is 𝜌=0.05𝜇m, and the wavelength is 𝜆=0.633𝜇m.

(a)

(b)