tidy3d.AutoGrid

class AutoGrid

Bases: GridSpec1d

Specification for non-uniform grid along a given dimension.

Parameters:

• min_steps_per_wvl (Attribute: min_steps_per_wvl) –

  Type	ConstrainedFloatValue
  Default	= 10.0
  Description	Minimal number of steps per wavelength in each medium.

• max_scale (Attribute: max_scale) –

  Type	ConstrainedFloatValue
  Default	= 1.4
  Description	Sets the maximum ratio between any two consecutive grid steps.

• dl_min (Attribute: dl_min) –

  Type	NonNegativeFloat
  Default	= 0
  Description	Lower bound of the grid size along this dimension regardless of structures present in the simulation, including override structures with enforced=True. It is a soft bound, meaning that the actual minimal grid size might be slightly smaller.

• mesher (Attribute: mesher) –

  Type	GradedMesher
  Default	= GradedMesher(type’GradedMesher’)
  Description	The type of mesher to use to generate the grid automatically.

Example

>>> grid_1d = AutoGrid(min_steps_per_wvl=16, max_scale=1.4)

See also

UniformGrid

Uniform 1D grid.

GridSpec

Collective grid specification for all three dimensions.

Notebooks:

• Using automatic nonuniform meshing

Lectures:

• Time step size and CFL condition in FDTD

• Numerical dispersion in FDTD

Attributes

Methods

min_steps_per_wvl

max_scale

dl_min

mesher

__hash__()

Hash method.