diff --git a/docs/_config.yml b/docs/_config.yml
deleted file mode 100644
index f841b3c..0000000
--- a/docs/_config.yml
+++ /dev/null
@@ -1,74 +0,0 @@
-# Book settings
-# Learn more at https://jupyterbook.org/customize/config.html
-title: cspdk
-author: gdsfactory
-logo: logo.png
-# Force re-execution of notebooks on each build.
-# See https://jupyterbook.org/content/execute.html
-execute:
-  execute_notebooks: cache
-  timeout: -1
-  allow_errors: false
-  # execute_notebooks: force
-  # execute_notebooks: "off"
-  # exclude_patterns:
-  #   - '*notebooks/devsim/01_pin_waveguide*'
-latex:
-  latex_engine: pdflatex # one of 'pdflatex', 'xelatex' (recommended for unicode), 'luatex', 'platex', 'uplatex'
-  use_jupyterbook_latex: true # use sphinx-jupyterbook-latex for pdf builds as default
-# Add a bibtex file so that we can create citations
-html:
-  home_page_in_navbar: true
-  use_edit_page_button: false
-  use_repository_button: false
-  use_issues_button: false
-  baseurl: https://github.com/gdsfactory/cspdk
-# Information about where the book exists on the web
-repository:
-  url: https://github.com/gdsfactory/cspdk
-  path_to_book: docs # Optional path to your book, relative to the repository root
-  branch: main # Which branch of the repository should be used when creating links (optional)
-launch_buttons:
-  notebook_interface: jupyterlab
-  colab_url: "https://colab.research.google.com"
-sphinx:
-  extra_extensions:
-    - "sphinx.ext.autodoc"
-    - "sphinx.ext.autodoc.typehints"
-    - "sphinx.ext.autosummary"
-    - "sphinx.ext.napoleon"
-    - "sphinx.ext.viewcode"
-    - "matplotlib.sphinxext.plot_directive"
-  config:
-    #autodoc_typehints: description
-    autodoc_typehints: description
-    autodoc_typehints_format: short
-    python_use_unqualified_type_names: True
-    autodoc_type_aliases:
-      "ComponentFactory": "ComponentFactory"
-      "ComponentSpec": "ComponentSpec"
-      "CrossSectionFactory": "CrossSectionFactory"
-      "CrossSectionSpec": "CrossSectionSpec"
-      "LayerSpec": "LayerSpec"
-      "LayerSpecs": "LayerSpecs"
-      "Layer": "Layer"
-      "Layers": "Layers"
-      "PathType": "PathType"
-      "SDict": "sax.SDict"
-      "sax.SDict": "sax.SDict"
-      "gdsfactory.typings.ComponentFactory": "ComponentFactory"
-      "gdsfactory.typings.ComponentSpec": "ComponentSpec"
-      "gdsfactory.typings.CrossSectionFactory": "CrossSectionFactory"
-      "gdsfactory.typings.CrossSectionSpec": "CrossSectionSpec"
-      "gdsfactory.typings.LayerSpec": "LayerSpec"
-      "gdsfactory.typings.LayerSpecs": "LayerSpecs"
-      "gdsfactory.typings.Layer": "Layer"
-      "gdsfactory.typings.Layers": "Layers"
-      "gdsfactory.typings.PathType": "PathType"
-      "CrossSection | str | dict[str, Any] | Callable[[...], CrossSection] | SymmetricalCrossSection | DCrossSection": "CrossSectionSpec"
-      "Component | ComponentAllAngle | str | dict[str, Any] | Callable[[...], Component]": "ComponentSpec"
-    nb_execution_raise_on_error: true
-    nb_custom_formats:
-      .py:
-        - jupytext.reads
-        - fmt: py
diff --git a/docs/_toc.yml b/docs/_toc.yml
deleted file mode 100644
index 9e9d5ba..0000000
--- a/docs/_toc.yml
+++ /dev/null
@@ -1,16 +0,0 @@
-# Table of contents
-# Learn more at https://jupyterbook.org/customize/toc.html
-format: jb-book
-root: index
-parts:
-  - caption: Reference
-    chapters:
-      - file: cells_si220_cband
-      - file: cells_si220_oband
-      - file: cells_si500
-      - file: cells_sin300
-      - file: changelog
-  - caption: Simulations
-    chapters:
-      - file: notebooks/meep_dc
-      - file: notebooks/meep_mmi