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Comparing different parpameters to be a plasmonic material

  1. Jun 18, 2013 #1
    Hello Everybody

    I want to do the comparison of metals like Silver, Gold, Aluminum, Copper, Sodium and Potassium as plasmonic metals. Now, I am confused about some parameters about what they really mean.

    1. what does ε(int) means? Is it better for a plasmonic material to have less ε(int)?

    2. What does "Plasma Frequency of a metal in eV" means here?

    3. What does ω(int) in eV means? Is it better to have more value of ω(int) in eV to be a better Plasmonic material?

    4. What does dumping rate in eV means? How it effect the property of a plasmonic material?

    5. What does happen if the light is incident to a plasmonic material below or more than plasmon frequency? Why this plasmon frequency is that so important?

    6. In a plasmonic material, the prime target is scattering of light? Why not absorption or transmission? What will be the problem if the light will be either absorbed or transmitted?

    I will be very much grateful if someone can give my answers. Also, if anyone can suggest any paper or, text book where I can get those answers, I will be really so grateful.

    Thanks in advance.
  2. jcsd
  3. Jun 18, 2013 #2


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    Any book on solid state theory should contain a chapter which explains most of the questions you are asking for, especially the meaning of plasma frequency, dielectric constant of a metal and its relation to the frequency of surface plasmons. Try e.g. Ashcroft and Mermin, Solid state physics.
  4. Jun 18, 2013 #3
    Thank you DrDu

    But it would be great if you can tell me now, what is ω (int) in eV means? It might be connected to Interband loss of a metal. If you can let me know about how it is related to Interband loss. And which one is better plasmonic metal actually with having ω (int) 3.2 or 1.2?

    Thanking you in advance
  5. Jun 18, 2013 #4


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    I am not a specialist on plasmonics. I may be that ω(int) is the band gap.
    Where did you find all these parameters? Are you referring to a specific article?
    Would be helpful to have some background information.
    I think you can't say absolutely which combination of the parameters makes a better plasmonic material. It rather depends on the frequency range you want your material to operate.
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