BDNL4 (LightPath)

Glasses, oxides and dielectrics supplier-datasheet Supplier: LightPath

1 dataset, together covering 1–14 µm. Default: BDNL4.

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Tick datasets in the list to add them to the plot (up to 12).

Datasets

BDNL4 n,k 1–14 µm default

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# BDNL4 (LightPath): BDNL4
lightpath_bdnl4 = ls.fetch_refractiveindex("specs", "LightPath-infrared", "BDNL4", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(lightpath_bdnl4.range_nm)  # (1000, 14000) nm
eps = lightpath_bdnl4.eps([3740])  # 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_d91ec25bd319/lightsmith"
lightpath_bdnl4 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(lightpath_bdnl4.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (lightpath-bdnl4/lightpath).

# ... load lightpath_bdnl4 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=lightpath_bdnl4)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=1000, stop_nm=14000, 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"]).

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 BDNL4 (LightPath)

Other names: BDNL4

API: /v1/materials/mat_4c15f623ba3d · slug lightpath-bdnl4