gdsfactory.cross_section.pn_with_trenches

gdsfactory.cross_section.pn_with_trenches(width: float = 0.5, layer: tuple[int, int] | str | int | LayerEnum = 'WG', layer_trench: tuple[int, int] | str | int | LayerEnum = 'DEEP_ETCH', gap_low_doping: float = 0.0, gap_medium_doping: float | None = 0.5, gap_high_doping: float | None = 1.0, offset_low_doping: float = 0.0, width_doping: float = 8.0, slab_offset: float | None = 0.3, width_slab: float | None = None, width_trench: float = 2.0, layer_p: tuple[int, int] | str | int | LayerEnum | None = 'P', layer_pp: tuple[int, int] | str | int | LayerEnum | None = 'PP', layer_ppp: tuple[int, int] | str | int | LayerEnum | None = 'PPP', layer_n: tuple[int, int] | str | int | LayerEnum | None = 'N', layer_np: tuple[int, int] | str | int | LayerEnum | None = 'NP', layer_npp: tuple[int, int] | str | int | LayerEnum | None = 'NPP', layer_via: tuple[int, int] | str | int | LayerEnum | None = None, width_via: float = 1.0, layer_metal: tuple[int, int] | str | int | LayerEnum | None = None, width_metal: float = 1.0, port_names: tuple[str, str] = ('o1', 'o2'), cladding_layers: Sequence[tuple[int, int]] | None = None, cladding_offsets: Sequence[float] | None = None, cladding_simplify: Sequence[float] | None = None, wg_marking_layer: tuple[int, int] | str | int | LayerEnum | None = None, sections: tuple[Section, ...] | None = None, **kwargs: Any) → CrossSection

Rib PN doped cross_section.

Parameters:

• width – width of the ridge in um.

• layer – ridge layer. None adds only ridge.

• layer_trench – layer to etch trenches.

• gap_low_doping – from waveguide center to low doping. Only used for PIN.

• gap_medium_doping – from waveguide center to medium doping. None removes it.

• gap_high_doping – from center to high doping. None removes it.

• offset_low_doping – from center to junction center.

• width_doping – in um.

• slab_offset – from the edge of the trench to the edge of the slab.

• width_slab – in um.

• width_trench – in um.

• layer_p – p doping layer.

• layer_pp – p+ doping layer.

• layer_ppp – p++ doping layer.

• layer_n – n doping layer.

• layer_np – n+ doping layer.

• layer_npp – n++ doping layer.

• layer_via – via layer.

• width_via – via width in um.

• layer_metal – metal layer.

• width_metal – metal width in um.

• port_names – input and output port names.

• cladding_layers – optional list of cladding layers.

• cladding_offsets – optional list of cladding offsets.

• cladding_simplify – Optional Tolerance value for the simplification algorithm. All points that can be removed without changing the resulting. polygon by more than the value listed here will be removed.

• wg_marking_layer – layer to draw over the actual waveguide.

• sections – optional list of sections.

• kwargs – cross_section settings.

                            offset_low_doping
                              <------>
                             |       |
                            wg     junction
                          center   center             slab_offset
                             |       |               <------>
 _____         ______________|_______ ______         ________
      |        |             |       |     |         |       |
      |________|             |             |_________|       |
            P                |       |               N       |
        width_p              |                    width_n    |
   <-------------------------------->|<--------------------->|
      <------->              |               |       N+      |
     width_trench            |               |    width_n    |
                             |               |<------------->|
                             |<------------->|
                             gap_medium_doping
<------------------------------------------------------------>
                         width_slab

import gdsfactory as gf

xs = gf.cross_section.pn_with_trenches(width=0.5, gap_low_doping=0, width_doping=2.)
p = gf.path.arc(radius=10, angle=45)
c = p.extrude(xs)
c.plot()

(Source code, png, hires.png, pdf)