Refractive index of Norland NOA 170

import lightsmith as ls

# Norland NOA 170: Iezzi et al. 2020: n 0.300–1.00 µm
norland_noa_170 = ls.fetch_refractiveindex("other", "Norland_NOA-170", "Iezzi", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(norland_noa_170.range_nm)  # (300, 1000) nm
eps = norland_noa_170.eps([633])  # complex permittivity

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_de2d06afeec3/lightsmith"
norland_noa_170 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(norland_noa_170.source)  # citation and provenance travel with the data

# ... load norland_noa_170 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=norland_noa_170)],
    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