DodecPhCLayout¶
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class
picazzo3.phc.generic.cell.
DodecPhCLayout
(*args, **kwargs)¶ Generic Layouting Cell for photonic crystals with 12-sided holes on a Triangular lattice. The Layout of the cell is made up of a map, which is a multiline string representing the unit cells on a regular triangular lattice. The letters in the ‘map’ correspond to the diameters of the holes in the dictionary ‘hole_sizes’. The pitches can be defined as cartesian pitches using the property ‘pitches’, or using the property ‘lattice_pitches’ which specifies the lattice vector along the horizontal and the oblique axis, or using the property ‘pitch’, which just sets a uniform pitch along all lattice vectors.
Parameters: name:
The unique name of the pcell
See also
Views
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Layout
¶ Parameters: lattice_pitches: Coord2
Lattice constants along the horizontal and the oblique direction. Choose identical values for a regular grid. If ‘pitches’ is manually set, this property will be ignored. If this property is set, the property ‘pitch’ will be ignored.
purpose: PatternPurpose
Purpose of the layer on which the holes should be drawn.
view_name: str and ( Alphanumeric string or Contains _$ )
The name of the view
cells:
dictionary of Unit Cells for a Photonic Crystal. The value should be of the form {‘x’: cell1, ‘y’: cell2}. The keys of the dictionary should be characters and each character can be used to identify the unit cell in the map. The default value of this property is automatically calculated from the dictiornary ‘hole_sizes’. Only assign to this property if you want to override this value. If you do this, the property ‘hole_sizes’ will be ignored.
hole_sizes: dict
dictionary of the hole sizes of the Photonic Crystal. The value should be of the form {‘x’: 0.25, ‘y’: 0.26}. The keys of the dictionary should be characters and each character can be used to identify the unit cell in the map. If the property ‘cells’ is set manually, hole_sizes’ will be ignored.
process_wg: ProcessLayer
Process of the layer on which the holes should be drawn.
pitch: float and Real, number and number >= 0
Lattice constant for a uniform triangular lattice. This property will be ignored if ‘lattice_pitches’ or ‘pitches’ are set manually
pitches:
Cartesian (X, Y) pitches of the lattice. If this is specified, the properties ‘lattice_pitches’ and ‘pitch’ will be ignored
map: str
Map of the photonic crystal. This property accepts a multi-line string. Every character in the string represents a unit cell of the photonic crystal, which can be found in the property cells
ports_coordinates:
list of tuple with (coordinate (in pitches), angle, waveguide_template, [name])
process_hfw: ProcessLayer
process for underetching
purpose_hfw: PatternPurpose
drawing purpose for underetching
zero_line_y: float
line in the map which corresponds to the coordinate y=0. This can be a fractional number, and the unit is relative to pitches.y .
Examples
import technologies.silicon_photonics from ipkiss3 import all as i3 TECH = i3.TECH from picazzo3.phc.generic import DodecPhCLayout my_phc_map = ["A A A A A A A A A A A", " B A A A A A A B", "A B A A A A B A", " A B A A B A", "A A B B B A A", " A A B B B B A A", "A A A B B A B B A A A", " A A A B A A B A A A", "A A A A A A A A A A A", ] # a W-shaped cavity cell = DodecPhCLayout(name="my_dodec_phc_layout1") layout = cell.Layout(pitch = 0.45, hole_sizes = {"A" : 0.290, "B" : 0.190}, # two sizes map = "\n".join(my_phc_map), zero_line_y = 5, #count lines from the top ports_coordinates = [((-0.5, 0), 180, TECH.PCELLS.WG.DEFAULT), ((10.5, 0), 0, TECH.PCELLS.WG.DEFAULT) ] # coordinates expressed in lattice pitches ) layout.visualize(annotate=True)
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