tidy3d.FluxTimeMonitor

class FluxTimeMonitor

Bases: AbstractFluxMonitor, TimeMonitor

Monitor that records power flux in the time domain.

Parameters:

• center (Attribute: center) –

  Type	Tuple[float, float, float]
  Default	= (0.0, 0.0, 0.0)
  Units	um
  Description	Center of object in x, y, and z.

• size (Attribute: size) –

  Type	Tuple[NonNegativeFloat, NonNegativeFloat, NonNegativeFloat]
  Default
  Units	um
  Description	Size in x, y, and z directions.

• name (Attribute: name) –

  Type	ConstrainedStrValue
  Default
  Description	Unique name for monitor.

• interval_space (Attribute: interval_space) –

  Type	Tuple[Literal[1], Literal[1], Literal[1]]
  Default	= (1, 1, 1)
  Description	Number of grid step intervals between monitor recordings. If equal to 1, there will be no downsampling. If greater than 1, the step will be applied, but the first and last point of the monitor grid are always included. Not all monitors support values different from 1.

• colocate (Attribute: colocate) –

  Type	Literal[True]
  Default	= True
  Description	Defines whether fields are colocated to grid cell boundaries (i.e. to the primal grid) on-the-fly during a solver run. Can be toggled for field recording monitors and is hard-coded for other monitors depending on their specific function.

• start (Attribute: start) –

  Type	NonNegativeFloat
  Default	= 0.0
  Units	sec
  Description	Time at which to start monitor recording.

• stop (Attribute: stop) –

  Type	Optional[NonNegativeFloat]
  Default	= None
  Units	sec
  Description	Time at which to stop monitor recording. If not specified, record until end of simulation.

• interval (Attribute: interval) –

  Type	Optional[PositiveInt]
  Default	= None
  Description	Sampling rate of the monitor: number of time steps between each measurement. Set interval to 1 for the highest possible resolution in time. Higher integer values downsample the data by measuring every interval time steps. This can be useful for reducing data storage as needed by the application.

• normal_dir (Attribute: normal_dir) –

  Type	Optional[Literal[‘+’, ‘-‘]]
  Default	= None
  Description	Direction of the surface monitor’s normal vector w.r.t. the positive x, y or z unit vectors. Must be one of '+' or '-'. Applies to surface monitors only, and defaults to '+' if not provided.

• exclude_surfaces (Attribute: exclude_surfaces) –

  Type	Optional[Tuple[Literal[‘x-’, ‘x+’, ‘y-’, ‘y+’, ‘z-’, ‘z+’], …]]
  Default	= None
  Description	Surfaces to exclude in the integration, if a volume monitor.

Notes

If the monitor geometry is a 2D box, the total flux through this plane is returned, with a positive sign corresponding to power flow in the positive direction along the axis normal to the plane. If the geometry is a 3D box, the total power coming out of the box is returned by integrating the flux over all box surfaces (except the ones defined in exclude_surfaces).

Example

>>> monitor = FluxTimeMonitor(
...     center=(1,2,3),
...     size=(2,2,0),
...     start=1e-13,
...     stop=5e-13,
...     interval=2,
...     name='flux_vs_time')

Attributes

Methods

storage_size(num_cells, tmesh)

Size of monitor storage given the number of points after discretization.

storage_size(num_cells, tmesh)

Size of monitor storage given the number of points after discretization.

__hash__()

Hash method.