How do I create a geometry group?

Date	Category
2023-12-06 22:15:15	Structures

A geometry group is a convenient way to gather multiple geometry objects into one collection. It can significantly improve performance when all the geometries in the group are assigned to the same medium. To create a geometry group, use the tidy3d.GeometryGroup object and set the geometries parameter as below:

cylinders = []

for i in range(0, 4):
  c = tidy3d.Cylinder(
    axis=2, radius=0.3, center=(i, 0, 0), length=2,
  )
  cylinders.append(c)

structure = tidy3d.Structure(
  geometry=tidy3d.GeometryGroup(geometries=cylinders),
  medium=tidy3d.Medium(permittivity=4),
)