Refractive index of P-FKHH2S (HIKARI)

import lightsmith as ls

# P-FKHH2S (HIKARI): P-FKHH2S
hikari_p_fk2s = ls.fetch_refractiveindex("specs", "HIKARI-optical", "P-FK2S", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(hikari_p_fk2s.range_nm)  # (400, 700) nm
eps = hikari_p_fk2s.eps([633])  # complex permittivity

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_c43d89c5b90a/lightsmith"
hikari_p_fk2s = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(hikari_p_fk2s.source)  # citation and provenance travel with the data

# ... load hikari_p_fk2s as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=hikari_p_fk2s)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=700, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength