Ge - Germanium (CRYSTRAN)

Glasses, oxides and dielectrics supplier-datasheet Supplier: CRYSTRAN

1 dataset, together covering 2.058–13.02 µm. Default: Ge - Germanium.

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Datasets

Ge - Germanium n,k 2.058–13.02 µm default

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# Ge - Germanium (CRYSTRAN): Ge - Germanium
crystran_ge = ls.fetch_refractiveindex("specs", "CRYSTRAN-optical", "Ge", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(crystran_ge.range_nm)  # (2058, 13020) nm
eps = crystran_ge.eps([5180])  # 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_6f540a28946c/lightsmith"
crystran_ge = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(crystran_ge.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (crystran-ge/crystran).

# ... load crystran_ge as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=crystran_ge)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=2058, stop_nm=13020, 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 Ge - Germanium (CRYSTRAN)

Other names: Ge

API: /v1/materials/mat_5b72d0b22b02 · slug crystran-ge