Added the silicon to plasmonic waveguide coupler notebook

[tomflexcompute]

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[github-actions]

Spell Check Report

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.

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Checked 1 notebook(s). Found spelling errors in 1 file(s).
Generated by GitHub Action run: https://github.com/flexcompute/tidy3d-notebooks/actions/runs/18547185663

[alec-flexcompute]

Excellent work from the original master of Tidy3D examples. I actually have no suggestions to improve - very clear and concise

[FilipeFcp]

This is great! I also have nothing to add