Optical constants

Refractive index of Rh (Rhodium)

Weaver et al. 1977: n,k 0.20–12.40 µm

Data: tabulated nk
Range: 0.2–12.4 µm
Points: 67
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 2.04478
Extinction coefficient k: 5.28015

Permittivity ε₁: -23.6989
Permittivity ε₂: 21.5934

Absorption coefficient α: 1.12921e+06 cm⁻¹
Penetration depth δ = λ/(2πk): 17.7115 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: 1.86567 µm⁻¹

Group index n_g: 0.948507
Group velocity dispersion: — fs²/mm

Dispersion parameter D: — ps/(nm·km)
Photon energy: 2.11001 eV

ε = (n + ik)², α = 4πk/λ, n_g = 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

# Rh (Rhodium): Weaver et al. 1977: n,k 0.20–12.40 µm
rh = ls.fetch_refractiveindex("main", "Rh", "Weaver", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(rh.range_nm)  # (200, 12400) nm
eps = rh.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_ebcc6f9325e3/lightsmith"
rh = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(rh.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (rh/weaver-1977).

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

References

1) J. H. Weaver, C. G. Olson, D. W. Lynch. Optical investigation of the electronic structure of bulk Rh and Ir. Phys. Rev. B 15, 4115 (1977)
2) Handbook of Optical Constants of Solids, Edward D. Palik, ed. Academic Press, Boston, 1985
* Ref. 2 provides numerical values for the graphical data reported in Ref. 1

doi:10.1103/physrevb.15.4115 Optical investigation of the electronic structure of bulk Rh and Ir, Physical Review B (1977)

Cite

J. H. Weaver, C. G. Olson and D. W. Lynch. Optical investigation of the electronic structure of bulk Rh and Ir. Physical Review B, 15, 4115-4118 (1977), doi:10.1103/physrevb.15.4115; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

67 rows as published

CSV comma separated TXT tab separated YAML n, k Full database record original YAML All quantities CSV JSON metadata

Rh (Rhodium), Weaver et al. 1977: n,k 0.20–12.40 µm: n and k versus wavelength
λ (µm)	n	k
0.2	0.78	1.85
0.2066	0.76	1.93
0.2138	0.79	2.0
0.2214	0.9	2.01
0.2296	0.8	2.14
0.2384	0.79	2.23
0.248	0.79	2.34
0.253	0.79	2.39
0.2583	0.79	2.46
0.2638	0.79	2.52
0.2695	0.78	2.6
0.2755	0.79	2.68
0.2818	0.8	2.76
0.2883	0.83	2.85
0.2952	0.84	2.94
0.3024	0.84	3.03
0.31	0.86	3.12
0.3179	0.88	3.23
0.3263	0.91	3.34
0.3351	0.95	3.45
0.3444	0.99	3.58
0.3542	1.04	3.71
0.3647	1.11	3.84
0.3757	1.2	3.97
0.3875	1.3	4.09
0.4	1.41	4.2
0.4133	1.53	4.29
0.4275	1.63	4.36
0.4592	1.8	4.49
0.4769	1.85	4.55
0.4959	1.88	4.65
0.5166	1.9	4.78
0.5391	1.94	4.94
0.5636	2.0	5.11
0.5904	2.05	5.3
0.6199	2.12	5.51
0.6526	2.2	5.76
0.6888	2.3	6.02
0.7293	2.42	6.33
0.7749	2.6	6.64
0.8266	2.78	6.97
0.8856	3.01	7.31
0.9537	3.26	7.63
0.9919	3.38	7.8
1.033	3.51	7.94
1.078	3.6	8.09
1.127	3.67	8.26
1.181	3.72	8.44
1.24	3.71	8.67
1.305	3.69	8.94
1.378	3.62	9.36
1.459	3.64	9.81
1.55	3.63	10.3
1.653	3.63	11.0
1.771	3.67	11.7
1.907	3.77	12.6
2.066	3.87	13.5
2.254	3.97	14.7
2.48	4.2	16.1
2.755	4.45	17.7
3.1	4.74	19.8
3.542	5.22	22.4
4.133	5.85	25.9
4.959	7.01	30.7
6.199	8.66	37.5
8.266	11.5	48.6
12.4	18.5	69.4

Optical transmission calculator

Free-standing sample in vacuum, normal incidence

Transmittance T: —
Reflectance R: —

Fresnel reflection calculator

R_p: —
R_s: —
R = (R_p+R_s)/2: —
Phase φ_p: —
Phase φ_s: —
Brewster angle θ_B: —
Critical angle θ_C: —

Rh (Rhodium): all datasets

About Rh (Rhodium)

Rhodium (Rh) is a rare, silvery-white, hard metal that is part of the platinum group metals (PGMs). With its impressive resistance to corrosion and oxidation, rhodium is often used as a catalyst in the chemical industry, especially in automotive catalytic converters to reduce harmful emissions. Additionally, due to its high reflectance, rhodium finds use in mirrors and searchlights. The metal is also employed in jewelry, typically as plating for white gold and silver, given its ability to impart a bright and durable finish. In electronics, rhodium is used in electrical contacts because of its low electrical resistance and exceptional wear resistance. Owing to its scarcity and the complex process of mining, rhodium is usually more expensive than gold or platinum.

More about Rh (Rhodium) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/main/Rh/nk/Weaver.yml
ID: ds_ebcc6f9325e3
API: /v1/datasets/ds_ebcc6f9325e3

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