Dear meep users,
I cannot seem to understand what is the unit convention when using a chi
2 medium.
The unit of χ(2) is m/V, and let's take for example a know crystal that
has a χ(2) of 5.6pm/V.
Does the value of χ(2) depend on the characteristic length of the
system, and what should be the value in the chi2 property anyway?
Thank you in advance.
Ioannis Papadopoulos
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