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

Figure 9

2D and 3D normalized intensity distribution |𝐸^𝑙₂|²/|𝐸^𝑙₂|²_max of Bessel multiplasmon in the air at the distance 𝑧=𝜆/3 μm from the interface of 50 nm thickness gold film of “SF10 glass—Au layer—air” structure. Bessel surface multiplasmon polariton is a superposition of 𝐽₃ and 𝐽₋₃ low-index (a, c) and high-index (b, d) BSPPs with wavelength 𝜆=0.633 μm.

(a)

(b)

(c)

(d)