# Configuration

The Solver Configuration tab gathers definitions regarding the mode solver simulation parameters.

# Simulation Domain

Definition of the simulation domain size.

# Center + size

Defines the mode solver simulation domain using a center position and size.

center: Center of the simulation domain in x, y, and z-directions.

Type: floating-point number

  • Unit: m, μm (default), or nm
  • Default: (0, 0, 0)

size: Size of the simulation domain in x, y, and z-directions.

Use Infinity to define a geometry extending to infinity in both directions along an axis.

Type: floating-point number

  • Unit: m, μm (default), or nm
  • Constraint: greater than or equal to 0
  • Required field

# Bounds

Constructs the simulation domain from minimum and maximum coordinate bounds.

min: Values of the x, y, and z coordinates defining the simulation domain lower corner.

Type: floating-point number

  • Unit: m, μm (default), or nm
  • Required field

max: Values of the x, y, and z coordinates defining the simulation domain upper corner.

Type: floating-point number

  • Unit: m, μm (default), or nm
  • Required field

# Grid Specification

Specifications for the simulation grid along each of the three directions.

See: GridSpec

# Boundary and Symmetry

# Boundary Condition

boundary_spec: Specification of boundary conditions along each dimension.

See: BoundarySpec

# Symmetry

symmetry: Defining reflection symmetry across a plane bisecting the simulation domain normal to the x-, y-, and z-axis, respectvely.

Note: The vectorial nature of the fields must be taken into account to correctly determine the symmetry value.

Options:

  • No symmetry (0 in Simulation JSON)
  • Even, i.e. 'PMC' symmetry (1 in Simulation JSON)
  • Odd, i.e. 'PEC' symmetry (-1 in Simulation JSON)

Default: No symmetry

# Subpixel Averaging

subpixel: If True, uses subpixel averaging of the permittivity based on structure definition, resulting in much higher accuracy for a given grid size.

Type: Boolean

  • Default: True

# Structure Priority Mode

structure_priority_mode: This field only affects structures with priority set to None.

Options:

  • equal (default): the priority of structures is set to 0.
  • conductor: the priority of structures made of LossyMetalMedium is set to 90, PECMedium to 100, and others to 0.

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