PbF₂ (Lead difluoride)

Glasses, oxides and dielectrics

1 dataset, together covering 0.3–11.9 µm. Default: Malitson and Dodge 1969: n 0.3–11.9 µm.

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Datasets

Malitson and Dodge 1969: n 0.3–11.9 µm n 0.3–11.9 µm default

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# PbF2 (Lead difluoride): Malitson and Dodge 1969: n 0.3–11.9 µm
pbf2 = ls.fetch_refractiveindex("main", "PbF2", "Malitson", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(pbf2.range_nm)  # (300, 11900) nm
eps = pbf2.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_293815d446b4/lightsmith"
pbf2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(pbf2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (pbf2/malitson-dodge-1969).

# ... load pbf2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=pbf2)],
    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_293815d446b4/lightsmith?model=drude_lorentz"
pbf2_dl = ls.DrudeLorentz.model_validate(json.load(urllib.request.urlopen(url)))

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

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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 PbF2 (Lead difluoride)

Lead difluoride (PbF₂) is a crystalline compound that exhibits notable optical properties. It has a wide transmission range, spanning from the ultraviolet to the far-infrared region, making it an attractive choice for certain optical applications. In addition, PbF₂ is used in the fabrication of specialty glass, especially in combination with heavy metals, to produce glasses with unique refractive properties. Its optical properties have also led to its consideration in infrared optics, such as in the production of lenses and windows for IR systems. However, due to the presence of lead, precautions should be taken when handling or working with PbF₂ to minimize exposure.

Other names: Lead difluoride, Lead fluoride, Lead(II) fluoride

API: /v1/materials/mat_416488499621 · slug pbf2