GeO₂ (Germanium dioxide, Germania)

2 datasets, together covering 0.1879–4.3 µm. Default: Fleming 1984: Fused germania; n 0.36–4.3 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

# GeO2 (Germanium dioxide, Germania): Fleming 1984: Fused germania; n 0.36–4.3 µm
geo2 = ls.fetch_refractiveindex("main", "GeO2", "Fleming", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(geo2.range_nm)  # (360, 4300) nm
eps = geo2.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_17616d424018/lightsmith"
geo2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(geo2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (geo2/fleming-1984).

# ... load geo2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=geo2)],
    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_17616d424018/lightsmith?model=drude_lorentz"
geo2_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 GeO2 (Germanium dioxide, Germania)

Germanium dioxide (GeO₂) is often encountered in crystalline forms, which are transparent in the ultraviolet and infrared regions of the spectrum. This material is important in optical applications like fiber optic systems, where it is used as a dopant to adjust the refractive index of silica fibers. The compound can exist in multiple polymorphs, including hexagonal and tetragonal forms, each with their own set of optical and mechanical properties. It's also a precursor for producing high-purity germanium for use in semiconductors.

Other names: Germanium dioxide, Germania, Germanium dioxide, Germanium(IV) oxide, Germania, Germanium oxide, Germanic oxide

API: /v1/materials/mat_1347e4974657 · slug geo2