KNbO₃ (Potassium niobate)

Glasses, oxides and dielectrics anisotropic

6 datasets, together covering 0.4–5.3 µm. Default: Zysset et al. 1992: n(α) 0.40–3.4 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

# KNbO3 (Potassium niobate): Zysset et al. 1992: n(α) 0.40–3.4 µm
knbo3 = ls.fetch_refractiveindex("main", "KNbO3", "Zysset-α", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(knbo3.range_nm)  # (400, 3400) nm
eps = knbo3.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_b88d300b1cf7/lightsmith"
knbo3 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(knbo3.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (knbo3/zysset-1992).

# ... load knbo3 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=knbo3)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, 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 KNbO3 (Potassium niobate)

Potassium niobate (KNbO₃) is a ferroelectric crystal with notable nonlinear optical properties. It is widely used in a range of optical applications, including frequency doubling, optical parametric oscillation, and electro-optic modulation. Due to its high damage threshold and broad phase-matching capabilities, it has become a material of choice for nonlinear optical applications in the visible and near-infrared spectral ranges. KNbO₃ is also known for its photorefractive properties, which are exploited in data storage and holography. However, the material is sensitive to moisture and can degrade over time if not properly stored, requiring a controlled environment for long-term use.

Other names: Potassium niobate

API: /v1/materials/mat_5ce6ffa3b174 · slug knbo3