W1WaveguideWithInlineCavity

class picazzo3.phc.w1.cell.W1WaveguideWithInlineCavity(*args, **kwargs)

A Uniform Photonic Crystal W1 waveguide with an inline cavity, 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. The property ‘cavity_hole_diameters’ specifies the holes of the cavity from east to west.

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

Parameters:

name:

The unique name of the pcell

Views

Layout
Parameters:

cavity_hole_diameters: list<number >= 0>

list of hole diameters in the cavity, including mirrors

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

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

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

diameter: float and number > 0

diameter of the photonic crystal lattice holes

n_o_cladding_layers: int and number > 0

Number of cladding layers north and south.

n_o_periods: int and number > 0

Number of lattice periods in the propagation direction.

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

from technologies import silicon_photonics
from ipkiss3 import all as i3
from picazzo3.phc.w1 import W1WaveguideWithInlineCavity

cell = W1WaveguideWithInlineCavity(name="my_w1_with_cavity")
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
                     cavity_hole_diameters = [0.14, 0.16, 0.18, 0.21, 0.0, 0.21, 0.18, 0.16, 0.14]
                     )

layout.visualize(annotate=True)
../../../../_images/picazzo3-phc-w1-cell-W1WaveguideWithInlineCavity-1.png