BaGa4S7 (Barium gallium sulfide, BGS)
Semiconductors and photonic platforms anisotropic
6 datasets, together covering 0.42–9.5 µm. Default: Badikov et al 2010: n(α) 0.420–9.50 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
# BaGa4S7 (Barium gallium sulfide, BGS): Badikov et al 2010: n(α) 0.420–9.50 µm
baga4s7 = ls.fetch_refractiveindex("main", "BaGa4S7", "Badikov-α", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(baga4s7.range_nm) # (420, 9500) nm
eps = baga4s7.eps([633]) # complex permittivityDownloads 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_886a7c6cc4a1/lightsmith"
baga4s7 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(baga4s7.source) # citation and provenance travel with the dataAny dataset here, as the library's Tabulated material (baga4s7/badikov-2010).
# ... load baga4s7 as above, then:
sim = ls.Simulation(
particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=baga4s7)],
medium_index=1.0,
wavelengths=ls.WavelengthRange(start_nm=420, stop_nm=1000, num=81),
)
res = ls.solve(sim) # exact Mie for a sphere
print(res.q_ext) # extinction efficiency at each wavelengthSame spec runs with DDA, FDTD, BEM or T-matrix: ls.compare(sim, ["mie", "dda"]).
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 BaGa4S7 (Barium gallium sulfide, BGS)
BaGa4S7, often abbreviated as BGS in scientific literature and industry documents, is a nonlinear optical crystal known for its high phase-matching capabilities, especially in the visible and near-infrared regions. This material is particularly valuable for frequency conversion applications, such as second-harmonic generation (SHG) and sum-frequency generation (SFG), owing to its high nonlinear optical coefficients. BaGa4S7 is also known for its high laser damage threshold, making it a robust choice for high-power optical applications. Typically grown through methods like the Bridgman technique, the crystal can be precisely cut and polished to create high-quality optical elements. One consideration for users is the material's sensitivity to moisture and chemicals, which necessitates careful handling and storage to preserve its optical properties. Despite this, BaGa4S7 remains a highly attractive material for various nonlinear optical applications, especially those requiring wide tunability, high power-handling, and efficient phase-matching capabilities.
Other names: Barium gallium sulfide, BGS, BGS
API: /v1/materials/mat_e69e5c9f68b9 · slug baga4s7