Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Surface Plasmons

  1. Apr 28, 2010 #1
    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 [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. :confused:
     
  2. jcsd
  3. Apr 28, 2010 #2

    Gokul43201

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    About the normal components: think Gauss' Law.

    For the connection between surface charge density and surface plasmons, go back to square one, and start at the definition of a surface plasmon.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Surface Plasmons
  1. Surface plasmon? (Replies: 2)

  2. Surface Plasmons ? (Replies: 3)

Loading...