Inc_tmm ("GTMM" in the backend tests)

← Verification · Thin films · Plane wave

Reference: inc_tmm ("GTMM" in the backend tests)
Kind: lineage: a code that shares PyStratify's ancestry. planar.py is Byrnes's tmm (MIT notice in src/pystratify/PLANAR-LICENSE.txt); the backend's inc_tmm/"GTMM" path descends from it (so did the site's JavaScript tutorial-engine.js, removed 2026-10-11). Agreement is a regression check only
Calculated: incoherent R, T, A
Agreement: 1e-8

The same stack: PyStratify's incoherent solver against inc_tmm, the lineage it replaced (GTMM in the backend tests) inc_tmm is the incoherent transfer matrix of S. J. Byrnes' tmm package, from which PyStratify's planar engine descends; it is kept as a lineage check, not an independent one. 31°, s polarization; the backend's tests run 120 random stacks as well.

R, PyStratify (pim_tmm) T, PyStratify (pim_tmm) A, PyStratify (pim_tmm) R, inc_tmm T, inc_tmm A, inc_tmm

Hover to read values.

largest |difference|: 0
PyStratify the lines, the reference the circles

Run it yourself: figures.py on GitHub, PyStratify 97e52a9