A metal film with complex relative permittivity at is deposited on the base of a…
PHYSICS · Multi-part · Fermi University Physics · Optics & Photonics · Condensed Matter, Materials & Soft Matter · Wave propagation and light in media
What an Instrument Can See, Ch Media that are designed: plasmons, metamaterials and photonic crystals
Problem
A metal film with complex relative permittivity ϵ~m=−16+2i at 405 nm is deposited on the base of a prism of index np=1.52, in the Kretschmann geometry, with air (ϵd=1) on the far side of the film.
((a)) Compute the coupling angle θ, measured inside the prism from the normal, at which the p-polarised reflectance dips.
((b)) Compute the plasmon's intensity propagation length along the surface.