Na (Sodium)

Metals and conductors

7 datasets, together covering 0.2–10.15 µm. Default: Smith 1969: n,k 0.313–2.24 µm.

Compare datasets

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

Datasets

Solid

Liquid

Inagaki et al. 1976: Liquid @ 120 °C; n,k 0.335–2.00 µm n,k 0.335–2 µm

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# Na (Sodium): Smith 1969: n,k 0.313–2.24 µm
na = ls.fetch_refractiveindex("main", "Na", "Smith", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(na.range_nm)  # (312.539, 2237.98) nm
eps = na.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_0242de265f8f/lightsmith"
na = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(na.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (na/smith-1969).

# ... load na as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=na)],
    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"]).

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 Na (Sodium)

Sodium (Na) is a soft, silvery-white, highly reactive alkali metal. Due to its high reactivity, it doesn't exist freely in nature and is usually found in the form of salts, like sodium chloride (NaCl or table salt). Sodium reacts vigorously with water, producing heat and forming sodium hydroxide and hydrogen gas. Optically, sodium's emission line in the yellow range (specifically around 589 nm) is well-known. This bright yellow "sodium line" emission is used in sodium vapor lamps, which are a type of gas discharge lamp. These lamps are used in street lighting and give off a characteristic yellow glow. The sodium doublet emission in the yellow range can also be used as a calibration source in spectroscopy.

Other names: Sodium

API: /v1/materials/mat_a92daeffce77 · slug na