PMLParams

PMLParams (opens new window) defines the complex frequency-shifted absorption profile used by PML and StablePML.

The GUI exposes these parameters for each selected boundary edge.

Sigma

sigma_order: Polynomial order for the absorber conductivity profile.

• Type: integer
• Constraint: greater than or equal to 0
• Default: 3

sigma_min: Minimum absorber conductivity.

• Type: floating-point number
• Unit: $2\epsilon_0 / \Delta t$
• Constraint: greater than or equal to 0
• Default: 0

sigma_max: Maximum absorber conductivity.

• Type: floating-point number
• Unit: $2\epsilon_0 / \Delta t$
• Constraint: greater than or equal to 0
• Default for PML: 1.5
• Default for StablePML: 1

Kappa

kappa_order: Polynomial order for the PML kappa profile.

• Type: integer
• Constraint: greater than or equal to 0
• Default: 3

kappa_min: Minimum kappa value.

• Type: floating-point number
• Constraint: greater than or equal to 0
• Default for PML and StablePML: 1

kappa_max: Maximum kappa value.

• Type: floating-point number
• Constraint: greater than or equal to 0
• Default for PML: 3
• Default for StablePML: 5

Alpha

alpha_order: Polynomial order for the PML alpha profile.

• Type: integer
• Constraint: greater than or equal to 0
• Default: 1

alpha_min: Minimum alpha value.

• Type: floating-point number
• Unit: $2\epsilon_0 / \Delta t$
• Constraint: greater than or equal to 0
• Default: 0

alpha_max: Maximum alpha value.

• Type: floating-point number
• Unit: $2\epsilon_0 / \Delta t$
• Constraint: greater than or equal to 0
• Default for PML: 0
• Default for StablePML: 0.9