Anisotropic Medium

AnisotropicMedium defines a diagonally anisotropic material.

This object corresponds to tidy3d.AnisotropicMedium (opens new window).

Name

name: Optional unique name for the medium.

Type

type: Medium model used by this material entry.

• Options: Anisotropic Medium

Color

color: Display color used for the medium in the GUI.

• Type: color
• Default: automatically assigned by the GUI

General Properties

The xx, yy, and zz fields define the diagonal components of the permittivity tensor.

Field	Axis component	Description	Required
xx	x-axis	Medium describing the x-axis component.	Yes
yy	y-axis	Medium describing the y-axis component.	Yes
zz	z-axis	Medium describing the z-axis component.	Yes

Supported options for all three fields:

• Medium
• LossyMetalMedium
• Pole Residue
• Sellmeier
• Lorentz
• Debye
• Drude
• PECMedium
• PMCMedium

Advanced

set_from_global_frequency: Toggle whether the frequency range is set from the Global Settings frequency range.

• Options:
  • True: Use the global frequency range and disable manual frequency range inputs.
  • False: Manually set frequency_range.

frequency_range: Optional range of validity for the medium.

• Type: two float numbers
• Unit: Hz, kHz, MHz, GHz, THz, or other available frequency unit
• Default: None

allow_gain: Toggle whether the medium is allowed to be active.

• Options: True/False
• Default: False

NOTE

Only diagonal anisotropy is supported for AnisotropicMedium. Use Fully Anisotropic Medium when off-diagonal tensor components are required.