How do I interpolate the electromagnetic field data at the Yee cell centers?

Date	Category
2023-12-19 12:29:51	Data Visualization and Postprocessing

To interpolate the electromagnetic fields to the Yee cell centers, you can use the method at_centers(monitor_name). For example:

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

# Interpolate the field at the Yee cell centers.
field_data_centered = sim_data.at_centers("monitor_name").interp(f=freq0)

By default, the electromagnetic fields are colocated to Yee grid boundaries. If you want to colocate data into custom coordinates, set colocate=False in field monitors to use the raw data on the Yee grid and avoid double interpolation.

For more details on visualizing and postprocessing simulation data, see this notebook.