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 carried out 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.
=================================================
Email has been scanned for spam and viruses by Altman Technologies' email
management service
The LSBU communications disclaimer can be found at
http://www.lsbu.ac.uk/ict/legal/_______________________________________________
meep-discuss mailing list
[email protected]
http://ab-initio.mit.edu/cgi-bin/mailman/listinfo/meep-discuss
