gdsfactory.cross_section.pn_with_trenches

gdsfactory.cross_section.pn_with_trenches#

gdsfactory.cross_section.pn_with_trenches(width: float = 0.5, layer: LayerSpec | None = None, layer_trench: LayerSpec = '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 | None = 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: LayerSpec | None = 'P', layer_pp: LayerSpec | None = 'PP', layer_ppp: LayerSpec | None = 'PPP', layer_n: LayerSpec | None = 'N', layer_np: LayerSpec | None = 'NP', layer_npp: LayerSpec | None = 'NPP', layer_via: LayerSpec | None = None, width_via: float = 1.0, layer_metal: LayerSpec | None = None, width_metal: float = 1.0, port_names: PortNames = ('o1', 'o2'), cladding_layers: Layers | None = None, cladding_offsets: Floats | None = None, cladding_simplify: Floats | None = None, wg_marking_layer: LayerSpec | None = None, sections: Sections | None = None, **kwargs: Any) → CrossSection[source]#

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)

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