Refractive index of CH₃OH (Methanol)

import lightsmith as ls

# CH3OH (Methanol): Myers et al. 2018: n,k 1.28–25.0 µm
ch3oh = ls.fetch_refractiveindex("organic", "methanol", "Myers", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ch3oh.range_nm)  # (1282.44, 25020.3) nm
eps = ch3oh.eps([5660])  # complex permittivity

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_509d05500609/lightsmith"
ch3oh = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(ch3oh.source)  # citation and provenance travel with the data

# ... load ch3oh as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=ch3oh)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=1283, stop_nm=25020, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength