BaGa₂GeSe₆ (BGGSe)

Semiconductors and photonic platforms anisotropic

2 datasets, together covering 0.778–10.6 µm. Default: Kato et al. 2018: n(o) 0.778–10.6 µm.

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Datasets

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# BaGa2GeSe6 (BGGSe): Kato et al. 2018: n(o) 0.778–10.6 µm
baga2gese6 = ls.fetch_refractiveindex("main", "BaGa2GeSe6", "Kato-o", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(baga2gese6.range_nm)  # (778, 10600) nm
eps = baga2gese6.eps([2870])  # 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_3da9313c651e/lightsmith"
baga2gese6 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(baga2gese6.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (baga2gese6/kato-2018-o).

# ... load baga2gese6 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=baga2gese6)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=778, 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"]).

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 BaGa2GeSe6 (BGGSe)

BaGa₂GeSe₆ (BGGSe) is a nonlinear optical crystal known for its wide transparency range and phase-matching capabilities in the mid-infrared region. It is particularly effective for frequency conversion applications, such as optical parametric oscillation, due to its high nonlinear optical coefficients. The material's broad phase-matching range and wide transparency window make it ideal for tunable laser systems operating in the mid-infrared spectrum. BGGSe also exhibits a high laser damage threshold, which makes it suitable for high-power applications. However, like many other chalcogenide crystals, it can be sensitive to moisture and requires careful handling and storage to maintain its optical quality. The crystal is typically grown using the Bridgman technique and can be polished into high-quality facets for optimal performance. Overall, BaGa₂GeSe₆ (BGGSe) represents a compelling option for nonlinear optical applications requiring a broad tunability and high power-handling capacity in the mid-infrared region.

Other names: BGGSe

API: /v1/materials/mat_723d30bc07d3 · slug baga2gese6