Os (Osmium)

3 datasets, together covering 0.00236–15 µm. Default: Windt et al. 1988: n,k 0.0024–0.122 µm.

Compare datasets

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

Datasets

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# Os (Osmium): Windt et al. 1988: n,k 0.0024–0.122 µm
os = ls.fetch_refractiveindex("main", "Os", "Windt", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(os.range_nm)  # (2.36, 121.57) nm
eps = os.eps([16.9])  # 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_67bda8afb414/lightsmith"
os = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(os.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (os/windt-1988).

# ... load os as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=os)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=3, stop_nm=121, 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 Os (Osmium)

Osmium (Os) is a dense, bluish-white transition metal that belongs to the platinum group in the periodic table. It is the densest naturally occurring element, with a density of around 22.59 g/cm³. Osmium has a very high melting point and is one of the least reactive elements. It is mostly used in alloys with other platinum group metals, enhancing hardness and durability. Due to its hardness, it's often used for the tips of instrument pivots, as well as electrical contacts. In the realm of optics, osmium's primary use has been as osmium tetroxide, which serves as a staining agent for biological samples in electron microscopy. However, osmium itself, being opaque, does not have notable optical applications. Safety note: Osmium tetroxide is highly toxic and should be handled with extreme care.

Other names: Osmium

API: /v1/materials/mat_ecccf4d5a057 · slug os