BD-2 (LightPath)

Glasses, oxides and dielectrics supplier-datasheet Supplier: LightPath

1 dataset, together covering 3–14 µm. Default: BD-2.

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

Datasets

BD-2 n,k 3–14 µm default

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# BD-2 (LightPath): BD-2
lightpath_bd_2 = ls.fetch_refractiveindex("specs", "LightPath-infrared", "BD-2", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(lightpath_bd_2.range_nm)  # (3000, 14000) nm
eps = lightpath_bd_2.eps([6480])  # 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_d38b675d7e12/lightsmith"
lightpath_bd_2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(lightpath_bd_2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (lightpath-bd-2/lightpath).

# ... load lightpath_bd_2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=lightpath_bd_2)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=3000, 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 BD-2 (LightPath)

Other names: BD-2

API: /v1/materials/mat_1e72a2d3f6ae · slug lightpath-bd-2