tidy3d.components.source.AngledFieldSource

class AngledFieldSource

Bases: DirectionalSource, ABC

A FieldSource defined with an angled direction of propagation.

Parameters:

• attrs (dict = {}) – Dictionary storing arbitrary metadata for a Tidy3D object. This dictionary can be freely used by the user for storing data without affecting the operation of Tidy3D as it is not used internally. Note that, unlike regular Tidy3D fields, attrs are mutable. For example, the following is allowed for setting an attr obj.attrs['foo'] = bar. Also note that Tidy3D` will raise a TypeError if attrs contain objects that can not be serialized. One can check if attrs are serializable by calling obj.json().

• name (Optional[str] = None) – Optional name for the source.

• center (Tuple[float, float, float] = (0.0, 0.0, 0.0)) – [units = um]. Center of object in x, y, and z.

• size (Tuple[NonNegativeFloat, NonNegativeFloat, NonNegativeFloat]) – [units = um]. Size in x, y, and z directions.

• source_time (Union[GaussianPulse, ContinuousWave, CustomSourceTime]) – Specification of the source time-dependence.

• direction (Literal['+', '-']) – Specifies propagation in the positive or negative direction of the injection axis.

• angle_theta (float = 0.0) – [units = rad]. Polar angle of the propagation axis from the injection axis.

• angle_phi (float = 0.0) – [units = rad]. Azimuth angle of the propagation axis in the plane orthogonal to the injection axis.

• pol_angle (float = 0) – [units = rad]. Specifies the angle between the electric field polarization of the source and the plane defined by the injection axis and the propagation axis (rad). pol_angle=0 (default) specifies P polarization, while pol_angle=np.pi/2 specifies S polarization. At normal incidence when S and P are undefined, pol_angle=0 defines: - Ey polarization for propagation along x.- Ex polarization for propagation along y.- Ex polarization for propagation along z.

Notes

The direction is defined by the polar and azimuth angles w.r.t. an injection axis, as well as forward + or backward -. This base class only defines the direction and injection_axis attributes, but it must be composed with a class that also defines angle_theta and angle_phi.

Attributes

attrs

Methods

glancing_incidence(val)

Warn if close to glancing incidence.

Inherited Common Usage

angle_theta

angle_phi

pol_angle

classmethod glancing_incidence(val)

Warn if close to glancing incidence.

__hash__()

Hash method.