Refractive index of CdSe (Cadmium selenide)

import lightsmith as ls

# CdSe (Cadmium selenide): Lisitsa et al. 1969: n(e) 1.01–22.0 µm
cdse = ls.fetch_refractiveindex("main", "CdSe", "Lisitsa-e", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdse.range_nm)  # (1010, 22000) nm
eps = cdse.eps([4710])  # complex permittivity

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_b317c36ec173/lightsmith"
cdse = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(cdse.source)  # citation and provenance travel with the data

# ... load cdse as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=cdse)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=1010, stop_nm=22000, 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_b317c36ec173/lightsmith?model=drude_lorentz"
cdse_dl = ls.DrudeLorentz.model_validate(json.load(urllib.request.urlopen(url)))