KI (Potassium iodide)

Glasses, oxides and dielectrics

1 dataset, together covering 0.25–50 µm. Default: Li 1976: n 0.25–50 µm.

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Tick datasets in the list to add them to the plot (up to 12).

Datasets

Li 1976: n 0.25–50 µm n 0.25–50 µm default

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# KI (Potassium iodide): Li 1976: n 0.25–50 µm
ki = ls.fetch_refractiveindex("main", "KI", "Li", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ki.range_nm)  # (250, 50000) nm
eps = ki.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_176b34402fb6/lightsmith"
ki = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(ki.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (ki/li-1976).

# ... load ki as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=ki)],
    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"]).

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_176b34402fb6/lightsmith?model=drude_lorentz"
ki_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 KI (Potassium iodide)

Potassium iodide (KI) is a salt that is often used in the field of optics as an infrared-transparent material, particularly in the mid-IR range. With good transmission properties and low-cost production, it finds applications in windows and prisms for spectroscopic applications. KI is highly soluble in water and hygroscopic, making it sensitive to moisture and requiring stringent storage conditions. One notable drawback of KI is its relatively low mechanical strength, making it less ideal for applications requiring high durability. Nevertheless, its broad transmission range and high refractive index make it valuable for specific optical needs.

Other names: Potassium iodide

Potassium iodide - Wikipedia

API: /v1/materials/mat_49c310cc147f · slug ki