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Refractive index for magnetic material

  1. Nov 18, 2015 #1
    hi, I have studied the general expression for metamaterial as

    n=√(εμ)
    for dielectric relative permeability is one and we have
    n=√ε,
    but what would be the refractive index for magnetic material , by seeing symmetry I figure out as
    n=√μ
    will it be valid and we have Lorentz model for dielectric do we have some model for magnetic material.
    thanks
    wasi
     
  2. jcsd
  3. Nov 18, 2015 #2

    DrDu

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    This is possible but not very general. Magnetic effects are but a special case of spatial dispersion. It is better to set ##\mu=1## and describe all possible magnetic effects in terms of a dielectric function depending not only on frequency but also on wavenumber, i.e. ##n=\sqrt{\epsilon(\omega,\mathbf{k})}##.
     
  4. Nov 18, 2015 #3
    thanks but for magnetic material
    n=√μ

    is this a valid expression for refractive index of magnetic materials.
     
  5. Nov 18, 2015 #4

    DrDu

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    Science Advisor

    Yes, of course
     
  6. Nov 19, 2015 #5
    thanks a lot
     
    Last edited by a moderator: Nov 19, 2015
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