SIMULATIONS & RESEARCH NOTES
Optics.
Numerical experiments in diffraction and coherence, with notes on optical modelling and recent photonics research. A smooth curve is not a convergence test. Unfortunately, the solver will happily draw one anyway.
01 / CHANGE SOMETHING
Numerical experiments
Each experiment includes its equations, source code and modelling limits.
Foundations
EXPERIMENT 01
Light at an Interface
Fresnel reflection and transmission, Brewster angle and total internal reflection.
Fresnel · TE / TMOpen experiment →EXPERIMENT 02
Thin-Film Interference
Coherent optical films, antireflection coatings and depth fields.
Scattering composition · TE / TMOpen experiment →EXPERIMENT 03
Transfer and Scattering Matrices
Inspect interface and propagation matrices and their numerical conditioning.
Wave matrices · stable scatteringOpen experiment →Materials
EXPERIMENT 01
Lorentz and Drude Models
Bound oscillators, free carriers, damping and complex optical response.
Passive analytic materialsOpen experiment →EXPERIMENT 02
Kramers–Kronig Relations
Causality, finite spectral windows and reconstruction from an assumed response.
Principal-value quadratureOpen experiment →EXPERIMENT 03
Material Builder
Compose, save and transfer passive oscillator materials.
Reusable material modelsOpen experiment →EXPERIMENT 04
Material Library
Versioned optical constants, source conditions and valid spectral ranges.
Sourced datasets · no extrapolationOpen experiment →Layered structures
EXPERIMENT 01
Layer-Stack Builder
Compose uniform layers from shared materials and calculate spectra and fields.
Coherent stacks · 100 layersOpen experiment →EXPERIMENT 02
Bragg Mirrors
Repeated dielectric layers, quarter-wave mirrors and finite reflection bands.
Finite AB stacksOpen experiment →EXPERIMENT 03
Defect Modes and Optical Cavities
Bragg-mirror spacers, localized resonances and spectral refinement.
Passive coherent cavitiesOpen experiment →Periodic structures
EXPERIMENT 01
1D grating diffraction
Coherent RCWA for a lamellar grating, with a contextual geometry editor, TE/TM diffraction efficiencies and Gaussian angular-spectrum fields.
1D RCWA · TE / TM · fields & beamsOpen experiment →EXPERIMENT 02
2D periodic grating diffraction
Full-vector RCWA for a rectangular pillar lattice, with a contextual geometry editor, polarization-resolved diffraction and electric-field reconstruction.
Vector RCWA · 2D periodicity · 3D fieldsOpen experiment →EXPERIMENT 03
Coherence in periodic multilayers
Compare coherent fringes, thickness averaging and incoherent returns using original dispersion tables.
Coherence · complex permittivity · absorptionOpen experiment →Notebook
The shared Notebook
Papers, ideas, working questions and comparisons across topics. Some entries are finished. Some are things to come back to.
Open Notebook →