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

Figure 10

2D normalized intensity distribution |𝐸^𝑙₂|²/|𝐸^𝑙₂|²_max of Bessel surface multiplasmon polariton in the air at the distance 𝑧=𝜆/3μm (a), 𝑧=𝜆/2 μm (b), and 𝑧=𝜆 μm (c) 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 BSPPs with wavelength 𝜆=0.633 μm.

(a)

(b)

(c)