stencil.apodized_grating

apodized_grating(teeth_gaps, teeth_widths, width, taper_length, taper_width)

Create an apodized grating.

Args

• teeth_gaps (float | Sequence[float]): Distance between adjacent grating teeth.
• teeth_widths (float | Sequence[float]): List of grating teeth width.
• width (float): Lateral grating width.
• taper_length (float): length of an optional linear taper ending at the grating.
• taper_width (float): width at the start of the linear taper.

Returns

list[Rectangle | Polygon]: Grating structures.

Note

Arguments teeth_gaps and teeth_widths can be a single number or a sequence. The largest sequence among them will define the number of teeth created. The smaller will be increased to the largest length by repeating its last element.

Example

>>> # Grating with taper, constant widths and varying spacings
>>> grating1 = pf.stencil.apodized_grating(
...     teeth_gaps=np.linspace(0.2, 0.4, 20),
...     teeth_widths=0.2,
...     width=10,
...     taper_length=30,
...     taper_width=0.5,
... )
>>> # Grating without taper, width and spacing variations
>>> grating2 = pf.stencil.apodized_grating(
...     teeth_gaps=np.linspace(0.2, 0.4, 20),
...     teeth_widths=np.linspace(0.4, 0.1, 20),
...     width=10,
... )
>>> grating2 = [s.translate((50, 0)) for s in grating2]
>>> component = pf.Component().add(*grating1, *grating2)