MID/QC Applied Substrate Series 9 - Field Aligned Optical Materials: Designing Substrates for Coherence Native Light Propagation

Optical materials are traditionally engineered through refractive index control, doping, and microstructural tuning. In the MID/QC framework, optical behavior emerges instead from field‑aligned substrate geometry that supports coherence‑native light propagation. This paper develops the substrate‑first model in which alignment fields, tension gradients, and coherence channels determine optical stability, loss characteristics, and propagation efficiency. The result is a unified architecture explaining anisotropic optical behavior, low‑loss propagation, coherence‑guided refraction, and substrate‑native photonic performance. This work extends the material‑alignment foundation of Series 6 and integrates directly with the photonic propagation models of Series 7 and the waveguide architecture of Series 8.