NaBr (Sodium bromide)

Glasses, oxides and dielectrics

1 dataset, together covering 0.21–34 µm. Default: Li 1976: n 0.21–34 µm.

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Datasets

Li 1976: n 0.21–34 µm n 0.21–34 µm default

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# NaBr (Sodium bromide): Li 1976: n 0.21–34 µm
nabr = ls.fetch_refractiveindex("main", "NaBr", "Li", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(nabr.range_nm)  # (210, 34000) nm
eps = nabr.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_a6faea122677/lightsmith"
nabr = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(nabr.source)  # citation and provenance travel with the data

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

# ... load nabr as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=nabr)],
    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_a6faea122677/lightsmith?model=drude_lorentz"
nabr_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 NaBr (Sodium bromide)

Sodium bromide (NaBr) is a white crystalline solid commonly used in various applications. In its pure form, it can be processed into clear crystalline windows or pieces, showcasing transparency not just in the visible range but also extensively into the infrared spectrum. This characteristic transparency in the infrared region is particularly beneficial, making NaBr an invaluable material in infrared spectroscopy and other related optical applications.

Other names: Sodium bromide, Sedoneural

Sodium bromide - Wikipedia

API: /v1/materials/mat_c205dd1ce07a · slug nabr