OctPhCLayout¶
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class
picazzo3.phc.generic.cell.
OctPhCLayout
(*args, **kwargs)¶ Generic Layouting cell for Photonic Crystals with octagon holes on a Rectangular lattice. The Layout of the cell is made up of a map, which is a multiline string representing the unit cells on a regular rectangular lattice. The letters in the ‘map’ correspond to the diameters of the holes in the dictionary ‘hole_sizes’.
Parameters: cell_instances: _PCellInstanceDict, optional
name: optional
The unique name of the pcell
See also
Views
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Layout
¶ Parameters: pitch: float and Real, number and number >= 0, optional
Lattice constant for a uniform square lattice. This property will be ignored if the property ‘pitches’ is set manually
view_name: str, optional
The name of the view
cells: optional
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, optional
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, optional
Process of the layer on which the holes should be drawn.
purpose: PatternPurpose, optional
Purpose of the layer on which the holes should be drawn.
map: str, optional
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
pitches: Coord2, optional
X and Y pitch of the photonic crystal
ports_coordinates: optional
list of tuple with (coordinate (in pitches), angle, waveguide_template, [name])
process_hfw: ProcessLayer, optional
process for underetching
purpose_hfw: PatternPurpose, optional
drawing purpose for underetching
zero_line_y: float, optional
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 .
grids_per_unit: locked
Number of grid cells per design unit
units_per_grid: locked
Ratio of grid cell and design unit
grid: float and number > 0, locked
design grid. Extracted by default from TECH.METRICS.GRID
unit: float and number > 0, locked
design unit. Extracted by default from TECH.METRICS.UNIT
Examples
import technologies.silicon_photonics from ipkiss3 import all as i3 TECH = i3.TECH from picazzo3.phc.generic import OctPhCLayout my_phc_map = ["AAAAAAAA", "AAAAAAAA", "AA AA AA", "BBBAABBB", "AAAAAAAA" ] cell = OctPhCLayout(name="my_oct_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()
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