CuGaS₂ (Copper gallium sulfide)

Semiconductors and photonic platforms anisotropic

4 datasets, together covering 0.55–11.5 µm. Default: Boyd et al. 1971: n(o) 0.55–11.5 µm; 20 °C.

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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

# CuGaS2 (Copper gallium sulfide): Boyd et al. 1971: n(o) 0.55–11.5 µm; 20 °C
cugas2 = ls.fetch_refractiveindex("main", "CuGaS2", "Boyd-20-o", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cugas2.range_nm)  # (550, 11500) nm
eps = cugas2.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_df37c3ecfc0d/lightsmith"
cugas2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(cugas2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (cugas2/boyd-1971-20-o).

# ... load cugas2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=cugas2)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=550, 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_df37c3ecfc0d/lightsmith?model=drude_lorentz"
cugas2_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 CuGaS2 (Copper gallium sulfide)

Copper gallium sulfide (CuGaS₂) is a ternary compound semiconductor that exhibits a chalcopyrite crystal structure. This material is notable for its non-linear optical properties and is frequently employed in non-linear frequency conversion applications such as second-harmonic generation and parametric down-conversion. Its large non-linear coefficients and extensive phase-matching capabilities make it an ideal choice for infrared and mid-infrared applications. The material also boasts high thermal conductivity and damage threshold, which lends itself well to high-power optical systems. While not as commonly used as some other non-linear optical materials, copper gallium sulfide remains a specialized choice for applications requiring efficient non-linear frequency conversion, particularly in the infrared spectrum.

Other names: Copper gallium sulfide, Copper gallium disulfide

API: /v1/materials/mat_6ccc75602a61 · slug cugas2