Refractive index of ZrTe5 (Zirconium pentatelluride)

import lightsmith as ls

# ZrTe5 (Zirconium pentatelluride): Guo et al. 2021: n,k(γ) 0.193–1.30 µm
zrte5 = ls.fetch_refractiveindex("main", "ZrTe5", "Guo-γ", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(zrte5.range_nm)  # (193, 1300) nm
eps = zrte5.eps([633])  # complex permittivity

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_7d009111a2db/lightsmith"
zrte5 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(zrte5.source)  # citation and provenance travel with the data

# ... load zrte5 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=zrte5)],
    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