Refractive index of Nanoscribe IP-Dip

import lightsmith as ls

# Nanoscribe IP-Dip: Mavrona et al. 2023: Cured; n,k 200–998 µm
mat = ls.fetch_refractiveindex("other", "Nanoscribe_IP-Dip", "Mavrona-cured", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(mat.range_nm)  # (199861, 997678) nm
eps = mat.eps([447000])  # complex permittivity

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_01ddd0346d13/lightsmith"
mat = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(mat.source)  # citation and provenance travel with the data

# ... load mat as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=mat)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=199900, stop_nm=997700, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength