How do I set a PointDipole source?

Date	Category
2023-12-07 15:15:41	Sources

The tidy3d.PointDipole is a zero-dimensional uniform current source. The example below illustrates how to define tidy3d.PointDipole within a simulation.

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

# Source definition
pt_dipole = tidy3d.PointDipole(
  center=(1,2,3),
  source_time=pulse,
  polarization='Ex',
  interpolate=True,
  name="dipole",
)

Use the center parameter to set the dipole position, then adjust the source_time dependence using tidy3d.GaussianPulse. The source polarization defines the direction and type of the current component. Finally, the parameter interpolate handles reverse interpolation of zero-size dimensions of the source. If False, the source data is snapped to the nearest Yee grid point. If True, equivalent source data is applied on the surrounding Yee grid points to emulate placement at the specified location using linear interpolation.

See this notebook to an example on setting up a tidy3d.PointDipole source.