Optical constants
Refractive index of CTK8 (LZOS)
CTK8: n 0.365–2.325 µm
- Data
- tabulated n
- Range
- 0.365–2.325 µm
- Points
- 31
- Licence
- CC0-1.0
Plot
Click the plot to set the calculator wavelength.
At one wavelength
- Refractive index n
- 1.70312
- Extinction coefficient k
- 0
- Permittivity ε1
- 2.90062
- Permittivity ε2
- 0
- Absorption coefficient α
- 0 cm⁻¹
- Penetration depth δ = λ/(2πk)
- — nm
- Abbe number Vd
- —
- Chromatic dispersion dn/dλ
- -0.0728823 µm⁻¹
- Group index ng
- 1.74595
- Group velocity dispersion
- — fs²/mm
- Dispersion parameter D
- — ps/(nm·km)
- Photon energy
- 2.11001 eV
ε = (n + ik)², α = 4πk/λ, ng = n − λ dn/dλ, GVD = λ³/(2πc²) d²n/dλ², D = −(λ/c) d²n/dλ². Group-velocity dispersion is given for formula data only.
Use it in Lightsmith
Load this data in Python, simulate in one more line
pip install lightsmith
import lightsmith as ls
# CTK8 (LZOS): CTK8
lzos_ctk8 = ls.fetch_refractiveindex("specs", "LZOS-optical", "CTK8", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(lzos_ctk8.range_nm) # (365, 2325.4) nm
eps = lzos_ctk8.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_98b940584e78/lightsmith"
lzos_ctk8 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(lzos_ctk8.source) # citation and provenance travel with the dataAny dataset here, as the library's Tabulated material (lzos-ctk8/lzos).
# ... load lzos_ctk8 as above, then:
sim = ls.Simulation(
particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=lzos_ctk8)],
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 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.
References
Cite
LZOS Clear optical glass catalogue; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)
Data
31 rows as published| λ (µm) | n |
|---|---|
| 0.365 | 1.73908 |
| 0.40466 | 1.72755 |
| 0.43583 | 1.720921 |
| 0.47999 | 1.713847 |
| 0.48613 | 1.713027 |
| 0.488 | 1.71279 |
| 0.514 | 1.70969 |
| 0.5208 | 1.70896 |
| 0.53 | 1.70802 |
| 0.54607 | 1.706497 |
| 0.5682 | 1.7046 |
| 0.58756 | 1.703125 |
| 0.58929 | 1.703 |
| 0.6328 | 1.70018 |
| 0.64385 | 1.699549 |
| 0.6471 | 1.69937 |
| 0.65627 | 1.698877 |
| 0.6943 | 1.69703 |
| 0.70652 | 1.69649 |
| 0.7682 | 1.69412 |
| 0.8521 | 1.69158 |
| 0.89 | 1.69062 |
| 1.06 | 1.68715 |
| 1.0139 | 1.68798 |
| 1.1286 | 1.68599 |
| 1.3951 | 1.68215 |
| 1.5296 | 1.68236 |
| 1.8131 | 1.67657 |
| 1.9701 | 1.67436 |
| 2.2493 | 1.67013 |
| 2.3254 | 1.6689 |
Optical transmission calculator
Free-standing sample in vacuum, normal incidence- Transmittance T
- —
- Reflectance R
- —
Fresnel reflection calculator
- Rp
- —
- Rs
- —
- R = (Rp+Rs)/2
- —
- Phase φp
- —
- Phase φs
- —
- Brewster angle θB
- —
- Critical angle θC
- —