Optical constants

Refractive index of Pt (Platinum)

Werner et al. 2009: DFT calculations; n,k 0.0176–2.48 µm

Data: tabulated nk
Range: 0.01759–2.48 µm
Points: 150
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 2.15644
Extinction coefficient k: 4.90455

Permittivity ε₁: -19.4044
Permittivity ε₂: 21.1527

Absorption coefficient α: 1.04888e+06 cm⁻¹
Penetration depth δ = λ/(2πk): 19.0679 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: 3.7921 µm⁻¹

Group index n_g: -0.0718038
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

# Pt (Platinum): Werner et al. 2009: DFT calculations; n,k 0.0176–2.48 µm
pt = ls.fetch_refractiveindex("main", "Pt", "Werner-DFT", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(pt.range_nm)  # (17.586, 2479.68) nm
eps = pt.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_980ac718a0e0/lightsmith"
pt = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(pt.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (pt/werner-2009-dft).

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

Comments and conditions

Theoretical density function theory (DFT) calculations.

References

W. S. M. Werner, K. Glantschnig, C. Ambrosch-Draxl. Optical constants and inelastic electron-scattering data for 17 elemental metals. J. Phys Chem Ref. Data 38, 1013-1092 (2009)

doi:10.1063/1.3243762 Optical Constants and Inelastic Electron-Scattering Data for 17 Elemental Metals, Journal of Physical and Chemical Reference Data (2009)

Cite

Wolfgang S. M. Werner, Kathrin Glantschnig and Claudia Ambrosch-Draxl. Optical Constants and Inelastic Electron-Scattering Data for 17 Elemental Metals. Journal of Physical and Chemical Reference Data, 38, 1013-1092 (2009), doi:10.1063/1.3243762; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

150 rows as published

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

Pt (Platinum), Werner et al. 2009: DFT calculations; n,k 0.0176–2.48 µm: n and k versus wavelength
λ (µm)	n	k
0.017586	0.8021	0.0966
0.017712	0.7969	0.1054
0.017839	0.7955	0.1219
0.017969	0.8267	0.1204
0.0181	0.8093	0.1094
0.018233	0.8021	0.111
0.018368	0.8011	0.1292
0.018505	0.8035	0.1033
0.018644	0.7779	0.1144
0.018785	0.77	0.148
0.018929	0.8102	0.1395
0.019074	0.7889	0.1394
0.019222	0.7811	0.1453
0.019373	0.7784	0.158
0.019525	0.782	0.1688
0.01968	0.7778	0.1703
0.019837	0.7611	0.1905
0.019997	0.8071	0.2819
0.02016	0.9058	0.1463
0.020325	0.8318	0.134
0.020493	0.8064	0.1389
0.020664	0.789	0.1502
0.020838	0.785	0.1681
0.021014	0.7805	0.171
0.021194	0.7764	0.1784
0.021377	0.7697	0.1858
0.021562	0.7694	0.1975
0.021752	0.7603	0.2098
0.021944	0.7778	0.2256
0.02214	0.778	0.2243
0.022339	0.7855	0.226
0.022543	0.7696	0.2352
0.022749	0.8035	0.2732
0.02296	0.8074	0.2167
0.023175	0.7804	0.2191
0.023393	0.762	0.2336
0.023616	0.755	0.249
0.023843	0.7564	0.2723
0.024075	0.7564	0.2849
0.024311	0.7599	0.3007
0.024551	0.7513	0.3154
0.024797	0.7351	0.3469
0.025047	0.7198	0.4383
0.025303	0.9274	0.6189
0.025564	1.1642	0.2817
0.02583	0.9654	0.1704
0.026102	0.8944	0.1895
0.02638	0.861	0.2009
0.026663	0.848	0.2052
0.026953	0.8089	0.2058
0.027249	0.7845	0.2396
0.027552	0.795	0.2793
0.027862	0.8251	0.266
0.028178	0.8035	0.2582
0.028502	0.7949	0.2774
0.028834	0.8245	0.2662
0.029173	0.7931	0.249
0.02952	0.7684	0.2596
0.029876	0.7588	0.2807
0.03024	0.7536	0.2966
0.030613	0.7585	0.3105
0.030996	0.7518	0.292
0.031388	0.737	0.3182
0.031791	0.7277	0.3325
0.032204	0.726	0.3437
0.032627	0.7259	0.3492
0.033062	0.7097	0.3628
0.033509	0.7291	0.3957
0.033968	0.734	0.3712
0.03444	0.708	0.3609
0.034925	0.6884	0.3871
0.035424	0.6937	0.3964
0.035937	0.6585	0.388
0.036466	0.6119	0.4224
0.03701	0.6268	0.4571
0.037571	0.5993	0.4606
0.038149	0.5571	0.482
0.038745	0.4926	0.5715
0.03936	0.5032	0.6687
0.039995	0.529	0.7647
0.040651	0.5898	0.83
0.041328	0.6689	0.9052
0.042029	0.8132	0.9302
0.042753	0.9392	0.8667
0.043503	0.9544	0.7245
0.04428	0.8996	0.6191
0.045085	0.7491	0.6581
0.04592	0.7291	0.7461
0.046786	0.7807	0.8127
0.047686	0.8063	0.7919
0.048621	0.7945	0.8187
0.049594	0.7982	0.7836
0.050606	0.7122	0.8039
0.05166	0.6484	0.8969
0.052759	0.6783	1.0541
0.053906	0.7254	1.1221
0.055104	0.7676	1.2162
0.056356	0.8752	1.3225
0.057667	1.0316	1.3339
0.05904	1.0754	1.287
0.06048	1.1382	1.3596
0.061992	1.2268	1.4795
0.063582	1.5903	1.4642
0.065255	1.665	1.1616
0.067018	1.585	1.0744
0.06888	1.6578	0.9057
0.070848	1.5507	0.7745
0.072932	1.4289	0.7653
0.075142	1.3489	0.7896
0.07749	1.2902	0.8371
0.07999	1.274	0.9078
0.082656	1.3123	0.9445
0.085506	1.3202	0.9555
0.08856	1.3305	0.9541
0.09184	1.3123	0.9445
0.095372	1.2613	0.9705
0.099187	1.2393	1.0139
0.10332	1.1619	1.1064
0.107812	1.2866	1.2342
0.112713	1.2284	1.2569
0.11808	1.2686	1.3778
0.123984	1.3459	1.5224
0.13051	1.5727	1.6129
0.13776	1.6846	1.4363
0.145864	1.7015	1.4863
0.15498	1.7824	1.3642
0.165312	1.7331	1.3848
0.17712	1.7497	1.2253
0.190745	1.5107	1.2634
0.20664	1.3683	1.4189
0.225426	1.2118	1.6794
0.247968	1.1964	1.981
0.261019	1.2161	2.1684
0.27552	1.259	2.3352
0.291728	1.2919	2.5052
0.30996	1.3402	2.7216
0.330625	1.4528	2.9147
0.354241	1.5322	3.0868
0.38149	1.5915	3.2997
0.413281	1.6767	3.5654
0.450852	1.8096	3.8383
0.495937	1.8867	4.1583
0.551041	2.0178	4.6198
0.619921	2.279	5.1563
0.708481	2.5818	5.7772
0.826561	3.0929	6.538
0.991874	3.8508	7.4101
1.239842	4.9157	8.3099
1.653123	6.0673	8.3525
2.479684	3.1421	11.542

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: —

Pt (Platinum): all datasets

Experimental data

Models and simulations

About Pt (Platinum)

Platinum (Pt) is a dense, malleable, and highly unreactive metal with a characteristic silvery-white appearance. It is one of the least reactive metals, showing significant resistance to corrosion, even at high temperatures. This makes it particularly valuable in industrial applications. Optically, platinum mirrors can be used in specialized optical instruments due to their durability and resistance to oxidation. Additionally, because of its inertness and ability to withstand high temperatures, platinum is commonly used as a substrate or material for thin-film deposition in various optical and electronic applications. In the broader industry, it's heavily used in catalytic converters for automobiles, in laboratory equipment, and in making jewelry due to its attractive appearance and resistance to tarnish.

More about Pt (Platinum) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/main/Pt/nk/Werner-DFT.yml
ID: ds_980ac718a0e0
API: /v1/datasets/ds_980ac718a0e0

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