Dear Brik
What you found is usual and is simply the signature of a high absorption in
this high energy region.
Indeed, a simple way to understand the negative value of eps1 is to look at the
following relation:
eps1 = n^2 - k^2
with n the real part and k the imaginary part of the complex
Hi
Im working on semiconductor material. I have calculated the real part of
dielectric function (epsilon1) as function of energy. For high energy , I
found epsilon1 negative !
Please can someone explain me what means this negative values ? I read that
any material havig an negative epsilon1 , it
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