Refractive index of NIFS-A (HIKARI)

import lightsmith as ls

# NIFS-A (HIKARI): NIFS-A
hikari_nifs_a = ls.fetch_refractiveindex("specs", "HIKARI-misc", "NIFS-A", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(hikari_nifs_a.range_nm)  # (184.89, 2325.42) nm
eps = hikari_nifs_a.eps([633])  # complex permittivity

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_078dadf6bcf5/lightsmith"
hikari_nifs_a = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(hikari_nifs_a.source)  # citation and provenance travel with the data

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

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_078dadf6bcf5/lightsmith?model=drude_lorentz"
hikari_nifs_a_dl = ls.DrudeLorentz.model_validate(json.load(urllib.request.urlopen(url)))