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How to Get Raw Data from a Simulation Object in Lumerical

Obtaining Raw Data from a Simulation Object in Lumerical

Lumerical – getdata – Script Command for Raw Data Pull

Need assistance in Ansys Lumerical obtaining raw data from a simulation object? The majority of the time, retrieving the entire dataset using getresult is more practical than getting individual data components using Lumerical’s getdata command script.

Prior to utilizing getdata, don’t forget to launch the simulation first.

For getdata Command Scripts in Lumerical MODE and FDTD:

Syntax Description

?getdata;

Function returns names of all objects with data.

?getdata(“monitor”)

Function returns list of of data within the simulation object.

out = getdata( “monitor”, “dataname”);

This function, however, pulls data from a monitor. For example, you can use

  • Ex = getdata(“monitor2″,”Ex”);

to get the Ex field data from monitor2.

out = getdata( “monitor”, “dataname”, option);

Option can be an optional parameter with a value of 1 or 2. If the answer is 2, the data is unfolded wherever possible in accordance with symmetry or anti-symmetry borders if it originates from a monitor that crosses such a barrier at x minimum, y minimum, or z minimum. Option’s default value is 2.

The user can also decide whether to expand the data to the appropriate size for dimensions when the field component is zero for propagator simulations in MODE using this option. For the field component in that dimension, option 1 will yield a singleton value of 0, while option 2 will produce a matrix (made up of zeros) that is the same size as the other field components.

For getdata Command Scripts in Lumerical CHARGE, HEAT, DGTD, FEEM:

Syntax Description

?getdata;

Function returns names of all objects with data.

?getdata(“monitor”)

Function returns list of of results within the simulation object.

?getdata( “monitor”, “result”);

Function returns list of of data within the simulation object result.

out = getdata( “monitor”, “result”, “dataname”);

Function pulls the simulation data.  (Note the differences here compared to MODE and FDTD).

For INTERCONNECT: Although INTERCONNECT offers the getdata command to be compatible with other Lumerical products, it is recommended that you use the getresult script function to obtain INTERCONNECT simulation data instead.

Practical getdata Lumerical Command Script Examples:

This example shows how to use getdata to check which data is available.

?getdata;
?getdata("monitor");
> monitor
> source
> 
> x y z surface_normal dimension f Ex Ey Ez
> Hx Hy Hz power

From here, we’ll plot an image of Ex(x,y) using getdata. We also demonstrate how to generate the same figure using getresult.

# get raw data with getdata
x=getdata("monitor","x");
y=getdata("monitor","y");
z=getdata("monitor","z");
f=getdata("monitor","f");
Ex=getdata("monitor","Ex");
# select first frequency point of Ex data, then create plot
?size(Ex);
Ex = pinch(Ex,4,1); 
image(x*1e6,y*1e6,Ex,"x (um)","y (um)","Ex");
# use getresult to get all of the E field data in a single command
E=getresult("monitor","E");
# select first frequency point of Ex data, then create plot
?size(E.Ex);
Ex = pinch(E.Ex,4,1); # select first frequency point to plot
image(E.x*1e6,E.y*1e6,Ex,"x (um)","y (um)","Ex");

Obtain the “Device region” object’s data list before obtaining the information on the “n” carrier concentration.

?getdata("Device region");
?getdata("Device region","active");
n=getdata("Device region","active","n");
?size(n);
> active drain source
> n p Ei Ec Ev Efn Efp log10(N) mun mup 
> result: 
>  2826 1 9 1 

 

 

 

 

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Ansys Lumerical FDTD

Simulation of Nanophotonic Devices

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Photonic Integrated Circuit Simulator

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3D Heat Transport Solver

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3D Electromagnetic (EM) Simulator

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Finite Element Waveguide Simulation

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