How do I set a PlaneWave source?

Date	Category
2023-12-08 12:26:07	Sources

The tidy3d.PlaneWave is a uniform current distribution on an infinite extent plane. The example below illustrates how to define a tidy3d.PlaneWave within a simulation.

# Source bandwidth.
pulse = tidy3d.GaussianPulse(freq0=200e12, fwidth=20e12)

# Source definition
source = tidy3d.PlaneWave(
  center=(0, 0, 5),
  size=(tidy3d.inf, tidy3d.inf, 0),
  source_time=pulse,
  direction='-',
  pol_angle=np.pi/2,
  angle_theta=0,
  angle_phi=0,
  name="plane_wave",
)

Use the center and size parameters to set the source position and dimension, then adjust the source_time dependence using tidy3d.GaussianPulse. The direction parameter specifies propagation in the positive or negative direction of the injection axis. You can change the light polarization using pol_angle, and adjust the propagation axis direction with angle_theta and angle_phito control the polar and azimuth angles.

This example illustrates setting up a tidy3d.PlaneWave source at normal and off-normal incidences.