LiI (Lithium iodide)

Glasses, oxides and dielectrics

1 dataset, together covering 0.25–25 µm. Default: Li 1976: n 0.25–25 µm.

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Datasets

Li 1976: n 0.25–25 µm n 0.25–25 µm default

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# LiI (Lithium iodide): Li 1976: n 0.25–25 µm
lii = ls.fetch_refractiveindex("main", "LiI", "Li", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(lii.range_nm)  # (250, 25000) nm
eps = lii.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_0d9d8474f4dc/lightsmith"
lii = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(lii.source)  # citation and provenance travel with the data

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

# ... load lii as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=lii)],
    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_0d9d8474f4dc/lightsmith?model=drude_lorentz"
lii_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 LiI (Lithium iodide)

Lithium iodide (LiI) is a compound that forms white, hygroscopic deliquescent crystals. In the context of optics, lithium iodide is known for its wide transmission range in the infrared spectrum. Because of its hygroscopic nature, it must be handled carefully to prevent moisture absorption, which could degrade its optical properties. LiI is less commonly used than some other alkali halides, like potassium bromide (KBr) or sodium chloride (NaCl), for infrared spectroscopy applications. However, it can still be found in specialized optical systems and sensors where its specific properties are needed.

Other names: Lithium iodide

API: /v1/materials/mat_3f8eb4b92f6b · slug lii