tidy3d.SubpixelSpec

class SubpixelSpec

Bases: Tidy3dBaseModel

Defines specification for subpixel averaging schemes when added to Simulation.subpixel.

Parameters:

• dielectric (Union[Staircasing, PolarizedAveraging, ContourPathAveraging] = PolarizedAveraging()) – Subpixel averaging method applied to dielectric material interfaces.

• metal (Union[Staircasing, VolumetricAveraging] = Staircasing()) – Subpixel averaging method applied to metallic structure interfaces. A material is considered as metallic if its real part of relative permittivity is less than 1 at the central frequency.

• pec (Union[Staircasing, HeuristicPECStaircasing, PECConformal] = PECConformal()) – Subpixel averaging method applied to PEC structure interfaces.

• pmc (Union[Staircasing, HeuristicPECStaircasing] = Staircasing()) – Subpixel averaging method applied to PMC structure interfaces.

• lossy_metal (Union[Staircasing, VolumetricAveraging, SurfaceImpedance] = SurfaceImpedance()) – Subpixel averaging method applied to td.LossyMetalMedium material interfaces.

Attributes

dielectric
metal
pec
pmc
lossy_metal

Methods

courant_ratio(contain_pec_structures, ...)	The scaling ratio applied to Courant number so that the courant number in the simulation is sim.courant * courant_ratio.
staircasing()	Apply staircasing on all material boundaries.

Inherited Common Usage

dielectric

metal

pec

pmc

lossy_metal

classmethod staircasing()

Apply staircasing on all material boundaries.

courant_ratio(contain_pec_structures, contain_sibc_structures)

The scaling ratio applied to Courant number so that the courant number in the simulation is sim.courant * courant_ratio. So far only PEC subpixel averaging scheme and SIBC require deduction of Courant number.