Refractive index of TiH2 (Titanium hydride)

import lightsmith as ls

# TiH2 (Titanium hydride): Palm et al. 2018: n,k 0.226–1.68 µm
tih2 = ls.fetch_refractiveindex("main", "TiH2", "Palm", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(tih2.range_nm)  # (226.076, 1684.53) nm
eps = tih2.eps([633])  # complex permittivity

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_001fb3b6f88a/lightsmith"
tih2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(tih2.source)  # citation and provenance travel with the data

# ... load tih2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=tih2)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=1000, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength