LiGaS₂ (Lithium gallium sulfide, LGS)

Semiconductors and photonic platforms anisotropic

3 datasets, together covering 1.025–10.59 µm. Default: Kato et al. 2017: n(α) 1.025–10.591 µm.

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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

# LiGaS2 (Lithium gallium sulfide, LGS): Kato et al. 2017: n(α) 1.025–10.591 µm
ligas2 = ls.fetch_refractiveindex("main", "LiGaS2", "Kato-α", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ligas2.range_nm)  # (1025, 10591) nm
eps = ligas2.eps([3290])  # 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_c456e2ea920b/lightsmith"
ligas2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(ligas2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (ligas2/kato-2017).

# ... load ligas2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=ligas2)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=1025, stop_nm=10590, 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 LiGaS2 (Lithium gallium sulfide, LGS)

Lithium gallium sulfide (LiGaS₂, abbreviated as LGS) is a nonlinear optical crystal material often employed in frequency conversion applications, including second harmonic generation and optical parametric oscillation. Its broad transparency range in the infrared spectrum and high nonlinearity make it suitable for laser systems and other photonics applications. Like other nonlinear optical materials, LGS needs to be phase-matched for effective frequency conversion, and its optical properties can vary with temperature and orientation. Special care must be taken in handling and storing the crystal to prevent degradation of its optical qualities.

Other names: Lithium gallium sulfide, LGS, Lithium gallium sulfide, LGS

API: /v1/materials/mat_8da4a4dc9bcf · slug ligas2