Optical material library¶

GSIM_MATERIAL_CARDS contains the built-in fallback optical models. Project and PDK cards take precedence.

Built-in cards¶

Silicon¶

Lookups	Supported values	Defaults	Paper
`Si` (default), `Si-Salzberg`	`λ = 1.357–11.04 µm` `T` fixed	`T = 299.15 K`	Salzberg and Villa 1957
`Si-Li-293K`	`λ = 1.2–14.0 µm` `T = 100–750 K`	`T = 293 K`	Li 1980

Silicon nitride¶

Lookups	Supported values	Defaults	Paper
`SiN` (default), `SiN-Luke`	`λ = 0.310–5.504 µm`	—	Luke et al. 2015

Fused silica¶

Lookups	Supported values	Defaults	Paper
`SiO2` (default), `SiO2-Malitson`	`λ = 0.21–6.7 µm` `T` fixed	`T = 293 K`	Malitson 1965

Lithium niobate¶

Lookups	Supported values	Defaults	Paper
`LN` (default), `LiNbO3-Zelmon`	`λ = 0.4–5.0 µm` `axis = o or e` `T` fixed	`T = 21 °C`	Zelmon et al. 1997
`LiNbO3-MgO5-Gayer`	`λ = 0.5–1.62 µm` `axis = o or e` `T = 20–100 °C`	`T = 24.5 °C`	Gayer et al. 2008

Refractive index¶

Curves span each model's full wavelength validity and use its default temperature.

from gsim.common.materials import resolve_material_snapshot

snapshot = resolve_material_snapshot("Si", wavelength_um=1.55)
print(snapshot.refractive_index)

Lookup is case-sensitive. A project card with the same name replaces that fallback.