How do I change the phase of fields obtained from frequency-domain monitors?

Date	Category
2023-12-19 20:07:15	Monitors

You can use the apply_phase() function to change the phase of fields obtained from frequency-domain monitors. For example:

import numpy as np

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

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

# Change the field phase by phi.
phi = 90 * np.pi / 180
field_phi = field_data.apply_phase(phi)

It’s useful in observing resonance details or producing animations.