How do I get the real part, imaginary part, or absolute value of complex-valued simulation data?

Date	Category
2023-12-19 15:25:59	Data Visualization and Postprocessing

The simulation data is stored as a DataArray object using the xarray package. You can think of it as a dataset where data is stored as a large multi-dimensional array (like a numpy array) and the coordinates along each of the dimensions are specified, so it is easy to work with.

Some of the available convenience methods provided by DataArray can be used to obtain the real, imaginary, or absolute value of complex-valued simulation data. For instance:

# Run the simulation and get the data.
sim_data = tidy3d.web.run(simulation, task_name="task", path="data/data.hdf5", verbose=True)

# Get all the data from a field monitor.
field_data = sim_data["field"]

# Get the real part of Ex field component.
ex_real = field_data.Ex.real

# Get the imaginary part of Ey field component.
ey_imag = field_data.Ey.imag

# Get the absolute value of Ez field component.
ez_abs = abs(field_data.Ez)

You can find detailed information about simulation data visualization and postprocessing in this tutorial.