Mechanism-separated lattice and cavity markers for differential liquid refractive-index readout: simulation data and postprocessing code

Simulation data and postprocessing code supporting the manuscript Mechanism-separated lattice and cavity markers for differential liquid refractive-index readout. A square array of silver nanocylinders on an Ag/SiO2/Ag stack supports two reflection minima governed by two different optical length scales: the long-wave marker is pinned to the ambient diagonal Rayleigh diffraction threshold, and the short-wave marker is the second longitudinal resonance of the dielectric spacer. This deposit contains every input the manuscript's figure and number producers read, those producers, the derived analysis records, and the eight published figures. Contents. Ambient-index, spacer, upper-film, radius, height, angle and period sweeps; baseline field cuts at both marker wavelengths; pattern-removal and dielectric-cylinder controls; order-resolved complex-field coefficients and the height-resolved decay record; paired-coordinate metric tables; the analysis code and the manuscript sources needed to regenerate the figures and reported values. Reproducing. Requires Python 3.11+ with NumPy, SciPy and Matplotlib. Run verify_deposit.py to check all files against MANIFEST.sha256, then build_figures.py, build_strengthled_figure.py and analyze_sensing.py. Verified from a clean extraction: all three producers complete and reproduce the manuscript's reported values, with a maximum relative deviation of 1.9×10-7 arising from iterative fits — far below the precision printed in the manuscript. Scope. The study is numerical throughout; no experimental data are included and none were taken. Calculations used Ansys Lumerical FDTD 2024 R1 with the solver's tabulated Palik silver and silica. The proprietary solver project (.fsp) files are not redistributed — one exceeds 400 MB and they are not inputs to any producer here — but the numerical configuration recovered from them is included in open form as fsp_configuration.json. They are available from the corresponding author on reasonable request. Quantities come from three simulation series with distinct configurations and are not pooled; reported linewidths and Q values are descriptors of sampled reflection minima, not intrinsic or pole quantities, and no detection limit or measurement precision is implied.