Refractive index of AMTIR-1 (AMI)

import lightsmith as ls

# AMTIR-1 (AMI): AMTIR-1
ami_amtir_1 = ls.fetch_refractiveindex("specs", "AMI-infrared", "AMTIR-1", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ami_amtir_1.range_nm)  # (1000, 14000) nm
eps = ami_amtir_1.eps([3740])  # complex permittivity

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_4af958317606/lightsmith"
ami_amtir_1 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(ami_amtir_1.source)  # citation and provenance travel with the data

# ... load ami_amtir_1 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=ami_amtir_1)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=1000, stop_nm=14000, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength