BaF2 (Barium fluoride)
Glasses, oxides and dielectrics
11 datasets, together covering 0.15–1000 µm. Default: Li 1980: n 0.15–15.0 µm.
Compare datasets
Tick datasets in the list to add them to the plot (up to 12).
Datasets
- Li 1980: n 0.15–15.0 µm
- Zheng et al. 2023: n 0.22–1.7 µm; 21 °C
- Zheng et al. 2023: n 0.22–1.7 µm; 186 °C
- Zheng et al. 2023: n 0.22–1.7 µm; 368 °C
- Querry 1987: n,k 0.220–167 µm
- Bosomworth 1967: k 55–1000 µm; 5 K
- Bosomworth 1967: n,k 56.5–1000 µm; 80 K
- Bosomworth 1967: k 71.5–1000 µm; 200 K
- Bosomworth 1967: n,k 77–1000 µm; 300 K
- Malitson 1964: n 0.265–10.3 µm
- Kaiser et al. 1962: n,k 10–80 µm
Use it in Lightsmith
Load this data in Python, simulate in one more line
pip install lightsmith
import lightsmith as ls
# BaF2 (Barium fluoride): Li 1980: n 0.15–15.0 µm
baf2 = ls.fetch_refractiveindex("main", "BaF2", "Li", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(baf2.range_nm) # (150, 15000) nm
eps = baf2.eps([633]) # complex permittivityDownloads 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_466790190ac2/lightsmith"
baf2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(baf2.source) # citation and provenance travel with the dataAny dataset here, as the library's Tabulated material (baf2/li-1980).
# ... load baf2 as above, then:
sim = ls.Simulation(
particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=baf2)],
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 wavelengthSame 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_466790190ac2/lightsmith?model=drude_lorentz"
baf2_dl = ls.DrudeLorentz.model_validate(json.load(urllib.request.urlopen(url)))A dispersive Drude–Lorentz model for time-domain solvers.
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 BaF2 (Barium fluoride)
BaF2, or barium fluoride, is a crystal that offers a wide transmission range, spanning from the ultraviolet into the mid-infrared regions. This material is commonly used in specialized optical applications such as scintillators in high-energy physics experiments, and as windows and lenses in infrared spectroscopy systems. It possesses a relatively low refractive index and high resistance to radiation damage, which makes it especially useful in extreme conditions. Additionally, BaF2 has fast scintillation response times, making it advantageous in fast-timing applications. One drawback, however, is that the crystal is hygroscopic, making it sensitive to moisture and requiring proper storage and handling to maintain its optical properties. It also has a lower resistance to thermal and mechanical shock compared to other fluoride crystals, which can be a consideration depending on the intended application. Despite these limitations, BaF2 remains a highly valuable material for specialized optical and photonic applications, owing to its broad transmission range and resilience to high-energy radiation.
Other names: Barium fluoride, Barium difluoride, Barium(II) fluoride
API: /v1/materials/mat_b052473d5be8 · slug baf2