Refractive index of AMTIR-3 (out of production) (AMI)

import lightsmith as ls

# AMTIR-3 (out of production) (AMI): AMTIR-3 (out of production)
ami_amtir_3 = ls.fetch_refractiveindex("specs", "AMI-infrared", "AMTIR-3", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ami_amtir_3.range_nm)  # (3000, 14000) nm
eps = ami_amtir_3.eps([6480])  # complex permittivity

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_a54abbce6f32/lightsmith"
ami_amtir_3 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(ami_amtir_3.source)  # citation and provenance travel with the data

# ... load ami_amtir_3 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=ami_amtir_3)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=3000, stop_nm=14000, 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_a54abbce6f32/lightsmith?model=drude_lorentz"
ami_amtir_3_dl = ls.DrudeLorentz.model_validate(json.load(urllib.request.urlopen(url)))