I'm still trying (yet unsuccessfully) to deal with surface plasmons, and I still hope on your help.(adsbygoogle = window.adsbygoogle || []).push({});

let me start like this:

I find in the review that:

We consider an interface in the xy-plane between two half-infinite spaces, 1 and 2, of materials the optical properties of which are described by their complex frequency-dependent dielectric functions [tex]\epsilon[/tex]_{1}([tex]\omega[/tex]) and [tex]\epsilon[/tex]_{2}([tex]\omega[/tex]), respectively. We ignore magnetic materials. Surface polaritons can only be excited at such an interface if the dielectric displacement [tex]\stackrel{\rightarrow}{D}[/tex] of the electromagnetic mode has a component normal to the surface which can induce a surface charge density [tex]\sigma[/tex],

(D2-D1)z=4[tex]\pi[/tex][tex]\sigma[/tex]

and here I found that I don't quite understand why there must be a component, normal to the surface, and what is the connection between surface charge density and surfacce plasmons.

Any help will be greatfully appreciated.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Surface Plasmons

**Physics Forums | Science Articles, Homework Help, Discussion**