W1Waveguide

class picazzo3.phc.w1.cell.W1Waveguide(*args, **kwargs)

A Uniform Photonic Crystal W1 waveguide consisting of 12-sided holes. You can specify the diameter of the lattice and the diameter of the defect holes in the core of the waveguide.

It is also possible to override the parameters of DodecPhCLayout, which allows you to customize the PCell in more detail.

Parameters:

cell_instances: _PCellInstanceDict, optional

name: optional

The unique name of the pcell

See also

picazzo3.phc.generic.cell.DodecPhCLayout

Views

Layout

Parameters:

lattice_pitches: Coord2, optional

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, optional

Purpose of the layer on which the holes should be drawn.

view_name: str, optional

The name of the view

defect_diameter: float and Real, number and number >= 0, optional

Diameter of the defect holes. If zero, no holes are drawn.

diameter: float and number > 0, optional

diameter of the photonic crystal lattice holes

n_o_cladding_layers: int and number > 0, optional

Number of cladding layers north and south.

n_o_periods: int and number > 0, optional

Number of lattice periods in the propagation direction.

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.

pitch: float and Real, number and number >= 0, optional

Lattice constant for a uniform triangular lattice. This property will be ignored if ‘lattice_pitches’ or ‘pitches’ are set manually

pitches: optional

Cartesian (X, Y) pitches of the lattice. If this is specified, the properties ‘lattice_pitches’ and ‘pitch’ will be ignored

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

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

""" A W1 waveguide with a missing row of holes """
from technologies import silicon_photonics
from ipkiss3 import all as i3
from picazzo3.phc.w1 import W1Waveguide
cell = W1Waveguide(name="my_w1")
layout = cell.Layout(pitch=0.43,            # lattice period of the triangular lattice
                     diameter=0.28,         # hole diameter of the lattice
                     n_o_cladding_layers=5, # number of rows on each side of the defect
                     n_o_periods=20         # length of the lattice
                     )

layout.visualize()

""" A W1 waveguide with a center row of holes of different size"""
from technologies import silicon_photonics
from ipkiss3 import all as i3
from picazzo3.phc.w1 import W1Waveguide
cell = W1Waveguide(name="my_w1_with_defect")
layout = cell.Layout(pitch=0.43,            # lattice period of the triangular lattice
                     diameter=0.28,         # hole diameter of the lattice
                     defect_diameter=0.16,  # defect hole diameter
                     n_o_cladding_layers=6, # number of rows on each side of the defect
                     n_o_periods=21         # length of the lattice
                     )

layout.visualize()