Refractive index of TiN (Titanium nitride)

import lightsmith as ls

# TiN (Titanium nitride): Shkondin et al. 2017: Annealed at 900 °C; n,k 0.211–1.69 µm
tin = ls.fetch_refractiveindex("main", "TiN", "Shkondin-900", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(tin.range_nm)  # (210.73, 1688.88) nm
eps = tin.eps([633])  # complex permittivity

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_4ed9451bd740/lightsmith"
tin = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(tin.source)  # citation and provenance travel with the data

# ... load tin as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=tin)],
    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