Dear All,
I
am stuck on how exactly to convert the parameters that pertain to the fitting
of the dispersive medium in SI units, to MEEP units:
Eps(w) = a + b / (d -w^2 + j * C * w)
where
w = 3e14 *2*pi /lambda
lambda is in micrometers (hence the w = 3e14).
The parameters that I have DO fit the n and k values for the
actual data for the sample. I converted them to MEEP units, from which I found
the sigma, omega, Eps and gamma. I put the values into the dispersive medium
model for the correct thickness of the sample, but upon generating the
transmission spectrum by normalising to a pulse; the fringes seemed to be
consistent with those of the actual sample, but the transmission was
significantly
under-predicted across the spectrum.
The conversions I have done are:
Eps stays the same
Sigma stays the same
Omega(meep) = sqrt(d).(a/(2*pi*c))
Gamma(meep) = C.(a/(2*pi*c))
where ‘a’ = lengthscale,
1 = 100 nm, hence ‘a’ = 1e-7
and c = 3e8
Could someone please tell me where I may be going wrong?
Many thanks.
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