LiF (Lithium fluoride)

Glasses, oxides and dielectrics

1 dataset, together covering 0.1–11 µm. Default: Li 1976: n 0.10–11 µm.

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Datasets

Li 1976: n 0.10–11 µm n 0.1–11 µm default

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# LiF (Lithium fluoride): Li 1976: n 0.10–11 µm
lif = ls.fetch_refractiveindex("main", "LiF", "Li", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(lif.range_nm)  # (100, 11000) nm
eps = lif.eps([633])  # complex permittivity

Downloads the original record once (pinned to the imported snapshot) and caches it.

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_3e311e71e95f/lightsmith"
lif = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(lif.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (lif/li-1976).

# ... load lif as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=lif)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=1000, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength

Same spec runs with DDA, FDTD, BEM or T-matrix: ls.compare(sim, ["mie", "dda"]).

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_3e311e71e95f/lightsmith?model=drude_lorentz"
lif_dl = ls.DrudeLorentz.model_validate(json.load(urllib.request.urlopen(url)))

A dispersive Drude–Lorentz model for time-domain solvers.

Materials guide Open a sphere of it in Studio Quick start Ask the community

Lightsmith is open source (MIT): Mie, T-matrix, BEM, DDA, FDTD, RCWA, TMM, mode solvers and inverse design behind one spec, on CPU or GPU. GitHub.

About LiF (Lithium fluoride)

Lithium fluoride (LiF) is a simple ionic compound commonly used in optics and radiation detection. It is transparent over a broad spectral range, from ultraviolet to mid-infrared wavelengths. This characteristic makes it an ideal material for specialized UV and IR windows and lenses. It also serves as a mount for samples to be studied by X-ray crystallography. One of its notable features is its high resistance to radiation damage, making it useful in environments with high-energy radiation. However, it is relatively soft and is moisture-sensitive, requiring careful handling to maintain its optical properties.

Other names: Lithium fluoride, Lithium(I) fluoride

API: /v1/materials/mat_cdd7252e0ced · slug lif