Added vertical grating coupler notebook and associated images

[tomflexcompute]

• Added vertical grating coupler notebook and associated images

• Edited the metadata on the 2x2 MMI notebook and the plasmonic coupler notebook.

[github-actions]

Spell Check Report

MMIPowerSplitter2x2.ipynb:

Cell 1, Line 3: 'AI-generated'
  > **Note: this notebook is 90% AI-generated.**

---

SiliconToPlasmonicCoupler.ipynb:

Cell 1, Line 3: 'dielectric-to-plasmonic'
  > This notebook explores the design and simulation of a dielectric-to-plasmonic waveguide coupler using Tidy3D. Such couplers enable efficient transfer of optical signals from conventional silicon photonic waveguides to plasmonic waveguides, which support highly confined modes beyond the diffraction limit.

---

VerticalGratingCoupler.ipynb:

Cell 10, Line 3: 'expensive-to-evaluate'
  > Bayesian optimization is a powerful strategy for optimizing expensive-to-evaluate functions, using a probabilistic model to efficiently explore the parameter space and identify optimal solutions with fewer simulations.

---

Checked 3 notebook(s). Found spelling errors in 3 file(s).
Generated by GitHub Action run: https://github.com/flexcompute/tidy3d-notebooks/actions/runs/19934291559

[alec-flexcompute]

Very interesting results from the AI: A couple things

For the MMI Power Splitter:

• Run all cells in order

• I don't think we need the note about divergence above cell 1

• The second paragraph above cell 1 says the same thing as the section above cell 3. Since the latter is more detailed, maybe nix the former?

• The "Key Design Parameters" bullets are kind of superfluous, maybe we could get rid of them

• In the cell above cell 5, the top comment isn't accurate

• The periods after every comment, including sentence fragments are a weird result of the AI

• Great results and analysis!

For the waveguide coupler:

• Above cell 10, maybe spell out "UCB" in case the user isn't familiar

• I can tell this simulation wasn't AI generated, because that's all the notes I have haha

For the grating coupler:

• In the into, the "T." in the citation isn't highlighted

• This is a great notebook, with useful visualization in diagrams and plotting!

[FilipeFcp]

Hi Tom.

The vertical grating coupler is a great example! I just have two really minor comments to nitpick:

• In the second code block, use a capital D in the first comment for consistency: # define → # Define
• In the fifth code block: # Gratingsize → # Grating size

Sorry, these are all tiny details, but the notebook is great. That’s all I found xd

[alec-flexcompute]

Looks great!