LiBr (Lithium bromide)

Glasses, oxides and dielectrics

1 dataset, together covering 0.21–20 µm. Default: Li 1976: n 0.21–20 µm.

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Datasets

Li 1976: n 0.21–20 µm n 0.21–20 µm default

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# LiBr (Lithium bromide): Li 1976: n 0.21–20 µm
libr = ls.fetch_refractiveindex("main", "LiBr", "Li", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(libr.range_nm)  # (210, 20000) nm
eps = libr.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_d564678c98e1/lightsmith"
libr = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(libr.source)  # citation and provenance travel with the data

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

# ... load libr as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=libr)],
    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_d564678c98e1/lightsmith?model=drude_lorentz"
libr_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 LiBr (Lithium bromide)

Lithium bromide (LiBr) is a salt that is most commonly used as a desiccant in air-conditioning systems. It is highly hygroscopic, easily absorbing water from the air. In the realm of optics, it is used less frequently but can serve as a transparent material in the infrared range. LiBr is soluble in water, alcohol, and other polar solvents, and it is generally not suitable for high-power optical applications due to its hygroscopic nature, which can lead to degradation over time when exposed to moisture.

Other names: Lithium bromide

API: /v1/materials/mat_e4660f8cbf87 · slug libr