Optical constants
Refractive index of Se (Selenium)
Campel and Johnson 1969: n(e) 1.06–10.6 µm
- Data
- tabulated n
- Range
- 1.06–10.6 µm
- Points
- 4
- Temperature
- 298 K
- Optical axis
- e
- State
- crystalline
- Licence
- CC0-1.0
Uniaxial crystal, axes: oe
Plot
Click the plot to set the calculator wavelength.
At one wavelength
- Refractive index n
- 3.46202
- Extinction coefficient k
- 0
- Permittivity ε1
- 11.9856
- Permittivity ε2
- 0
- Absorption coefficient α
- 0 cm⁻¹
- Penetration depth δ = λ/(2πk)
- — nm
- Abbe number Vd
- —
- Chromatic dispersion dn/dλ
- -0.0504464 µm⁻¹
- Group index ng
- 3.63101
- Group velocity dispersion
- — fs²/mm
- Dispersion parameter D
- — ps/(nm·km)
- Photon energy
- 0.370102 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
# Se (Selenium): Campel and Johnson 1969: n(e) 1.06–10.6 µm
se = ls.fetch_refractiveindex("main", "Se", "Campel-e", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(se.range_nm) # (1060, 10600) nm
eps = se.eps([3350]) # 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_6293002deb7c/lightsmith"
se = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(se.source) # citation and provenance travel with the dataAny dataset here, as the library's Tabulated material (se/campel-johnson-1969-e).
# ... load se as above, then:
sim = ls.Simulation(
particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=se)],
medium_index=1.0,
wavelengths=ls.WavelengthRange(start_nm=1060, stop_nm=10600, 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.
Comments and conditions
Conditions
- temperature
- 298 K
- direction
- e
References
- doi:10.1364/josa.59.000072 Index of Refraction of Single-Crystal Selenium, Journal of the Optical Society of America (1969)
Cite
L. Gampel and F. M. Johnson. Index of Refraction of Single-Crystal Selenium. Journal of the Optical Society of America, 59, 72 (1969), doi:10.1364/josa.59.000072; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)
Data
4 rows as published| λ (µm) | n |
|---|---|
| 1.06 | 3.608 |
| 1.15 | 3.573 |
| 3.39 | 3.46 |
| 10.6 | 3.41 |
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
- —
Single-crystal selenium; 23 °C; Extraordinary ray.