Refractive index of Norland NOA 61

import lightsmith as ls

# Norland NOA 61: Joseph et al. 2020: 1000-nm film, Uncured; n 0.246–1.69 µm
norland_noa_61 = ls.fetch_refractiveindex("other", "Norland_NOA-61", "Joseph", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(norland_noa_61.range_nm)  # (245.8, 1688) nm
eps = norland_noa_61.eps([633])  # complex permittivity

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_1b963e5fc548/lightsmith"
norland_noa_61 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(norland_noa_61.source)  # citation and provenance travel with the data

# ... load norland_noa_61 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=norland_noa_61)],
    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