Learning Forum

[mwhitby]

Is there a way to extract the electric field intensity at a point from a simulation? I was looking at the script command farfieldexact() but I don't know if this does what I want it to do. I also found the Electrical field monitor but this I believe just gives electric field at points not electric field intensity. Is there a way for me to give the program a point and ask it to calculate the resulting electric field intensity at that point? I would imagine that in order to create Modal fields plots for E intensity the simulation must have access to the data. I just can't seem to see how to extract it. Any information is appreciated. Thanks!

[Guilin Sun]

Sure, in FDTD you can get E,H, and Poynting vector at any point inside the simulation region, as long as you choose to record them in the monitor settings, by use of a frequency-domain monitor.
When you say electric field intensity, do you mean abs(E)^2? if yes, you can simply use
getelectric - Script command
More generally, you can get the vector E and intensity by use of getresult.eg:
EE=getresult(Monitor name","E"); # the result is a dataset Introduction to Lumerical datasets
Ex=EE.Ex; #Ex component of the electric field
E2=EE.E2 # intensity of E, eg abs(E)^2;
please refer getresult - Script command
you can use "?" to get the data you can extract from a monitor:
?getresult("monitor name")
or the parameters in the dataset "EE" from above script:
?EE;

Please try and let me know if you have questions.

[mwhitby]

Thank you! This was very helpful. Just to confirm, the values from abs(E)^2 are what are used to plot the E intensity in modal fields plots is that correct? Thank you again !

[Guilin Sun]

Yes, you are right. It is abs(Ex)^2+abs(Ey)^+abs(Ez)^2, which is the abs(E)^2, and the result of getelectric, as well as the E2 in the data above mentioned.

[Rishad Arfin]

This was helpful.

[namratah]

Hello Sir!

I'm not able to open the scripts.

Please help in it.