Refractive index of TlBr-TlI (Thallium bromo-iodide, KRS-5)

import lightsmith as ls

# TlBr-TlI (Thallium bromo-iodide, KRS-5): Rodney and Malitson 1956: n 0.577–39.38 µm
tlbr_tli = ls.fetch_refractiveindex("other", "TlBr-TlI", "Rodney", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(tlbr_tli.range_nm)  # (577, 39380) nm
eps = tlbr_tli.eps([633])  # complex permittivity

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_5e00395935c3/lightsmith"
tlbr_tli = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(tlbr_tli.source)  # citation and provenance travel with the data

# ... load tlbr_tli as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=tlbr_tli)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=577, 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_5e00395935c3/lightsmith?model=drude_lorentz"
tlbr_tli_dl = ls.DrudeLorentz.model_validate(json.load(urllib.request.urlopen(url)))