- #1
geo_alchemist
- 35
- 0
I'm still trying (yet unsuccessfully) to deal with surface plasmons, and I still hope on your help.
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 \epsilon1(\omega) and \epsilon2(\omega), respectively. We ignore magnetic materials. Surface polaritons can only be excited at such an interface if the dielectric displacement \stackrel{\rightarrow}{D} of the electromagnetic mode has a component normal to the surface which can induce a surface charge density \sigma,
(D2-D1)z=4\pi\sigma
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.
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 \epsilon1(\omega) and \epsilon2(\omega), respectively. We ignore magnetic materials. Surface polaritons can only be excited at such an interface if the dielectric displacement \stackrel{\rightarrow}{D} of the electromagnetic mode has a component normal to the surface which can induce a surface charge density \sigma,
(D2-D1)z=4\pi\sigma
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.