CH₄N₂O (Urea)

2 datasets, together covering 0.3–1.06 µm. Default: Rosker et al. 1985: n(o) 0.3–1.06 µm.

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Datasets

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# CH4N2O (Urea): Rosker et al. 1985: n(o) 0.3–1.06 µm
ch4n2o = ls.fetch_refractiveindex("organic", "urea", "Rosker-o", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ch4n2o.range_nm)  # (300, 1060) nm
eps = ch4n2o.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_ca3125162f9a/lightsmith"
ch4n2o = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(ch4n2o.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (urea/rosker-1985-o).

# ... load ch4n2o as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=ch4n2o)],
    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 CH4N2O (Urea)

Urea (CH₄N₂O) is an organic compound that appears as white crystalline solid. It is highly soluble in water and is the primary nitrogenous end product of protein metabolism, produced by the liver and released into the bloodstream to be eliminated by the kidneys in the urine. Urea is also synthesized on an industrial scale worldwide and has a variety of applications. One of its most common uses is as a nitrogen-release fertilizer, providing an accessible nitrogen source for plant growth. Additionally, urea finds applications in the production of resins and plastics, and it is a component in many cosmetic and skincare products for its moisturizing properties. In the realm of optics, urea is notable for its ability to form birefringent crystals and has been used in some optical devices. However, when handling urea, especially in industrial settings, it's important to note that prolonged exposure can cause mild skin or eye irritation. Chemical formula: CO(NH₂)₂

Other names: CH4N2O, CH₄N₂O, Carbamide, Carbonyl diamide, Carbonyldiamine, Diaminomethanal, Diaminomethanone

API: /v1/materials/mat_56490943b63f · slug urea