Optical constants
Refractive index of Ir (Iridium)
Hass et al. 1967: n,k 0.005–0.546 µm; deposited at 40 °C
- Data
- tabulated nk
- Range
- 0.05–0.5461 µm
- Points
- 17
- Licence
- CC0-1.0
Plot
Click the plot to set the calculator wavelength.
At one wavelength
- Refractive index n
- 1.20393
- Extinction coefficient k
- 1.14042
- Permittivity ε1
- 0.148876
- Permittivity ε2
- 2.74598
- Absorption coefficient α
- 868545 cm⁻¹
- Penetration depth δ = λ/(2πk)
- 23.027 nm
- Abbe number Vd
- —
- Chromatic dispersion dn/dλ
- 2.92855 µm⁻¹
- Group index ng
- 0.720717
- Group velocity dispersion
- — fs²/mm
- Dispersion parameter D
- — ps/(nm·km)
- Photon energy
- 7.51419 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
# Ir (Iridium): Hass et al. 1967: n,k 0.005–0.546 µm; deposited at 40 °C
ir = ls.fetch_refractiveindex("main", "Ir", "Hass-40C", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ir.range_nm) # (50, 546.1) nm
eps = ir.eps([165]) # 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_eefdaebd860b/lightsmith"
ir = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(ir.source) # citation and provenance travel with the dataAny dataset here, as the library's Tabulated material (ir/hass-1967-40c).
# ... load ir as above, then:
sim = ls.Simulation(
particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=ir)],
medium_index=1.0,
wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=546, 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
- substrate
- glass
- deposition temperature
- 313
References
- doi:10.1364/josa.57.000758 Optical Properties of Evaporated Iridium in the Vacuum Ultraviolet from 500 Å to 2000 Å *†, Journal of the Optical Society of America (1967)
Cite
G. Hass, G. F. Jacobus and W. R. Hunter. Optical Properties of Evaporated Iridium in the Vacuum Ultraviolet from 500 Å to 2000 Å *†. Journal of the Optical Society of America, 57, 758 (1967), doi:10.1364/josa.57.000758; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)
Data
17 rows as published| λ (µm) | n | k |
|---|---|---|
| 0.05 | 0.68 | 0.77 |
| 0.055 | 0.73 | 0.84 |
| 0.06 | 0.8 | 0.88 |
| 0.065 | 0.89 | 0.87 |
| 0.07 | 1.0 | 0.83 |
| 0.075 | 1.06 | 0.83 |
| 0.08 | 1.08 | 0.84 |
| 0.085 | 1.09 | 0.87 |
| 0.09 | 1.08 | 0.89 |
| 0.095 | 1.1 | 0.93 |
| 0.1 | 1.13 | 0.97 |
| 0.11 | 1.18 | 1.04 |
| 0.12 | 1.22 | 1.01 |
| 0.13 | 1.23 | 0.99 |
| 0.14 | 1.22 | 0.99 |
| 0.15 | 1.16 | 1.02 |
| 0.5461 | 2.32 | 4.2 |
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
- —
Thin film deposited at 40 °C