How Does MEEP Represent CustomSource? #2809
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Hello, I am working on creating a dipole emitter in MEEP, but would just like to point to some lines of code in the project that correlate the CustomSource function in python (and its src_func) to an electric field in the simulation. In my project, I have an array of how a dipole moment changes over time, and would like to produce an electric field from its changes using CustomSource. Can anyone help me? Thank you! |
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With a source, you are (by default) specifying the current density J in Maxwell's equations. There is no simple relationship (in general) between the current source and the resulting electric field, because it depends on the surrounding materials. This is a Meep FAQ. If you have a dipole moment (polarization) density P, the current density J=dP/dt is the time derivative of this. However, if you set the flag |
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Thank you for your help! |
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With a source, you are (by default) specifying the current density J in Maxwell's equations. There is no simple relationship (in general) between the current source and the resulting electric field, because it depends on the surrounding materials.
This is a Meep FAQ.
If you have a dipole moment (polarization) density P, the current density J=dP/dt is the time derivative of this. However, if you set the flag
is_integrated=TrueinCustomSource, then your custom source is precisely the dipole moment density P.