At one wavelength

Refractive index n: 0.24388
Extinction coefficient k: 3.05796

Permittivity ε₁: -9.29164
Permittivity ε₂: 1.49155

Absorption coefficient α: 653973 cm⁻¹
Penetration depth δ = λ/(2πk): 30.5823 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: -1.95 µm⁻¹

Group index n_g: 1.3897
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

# Au (Gold): Olmon et al. 2012: Template-stripped gold; n,k 0.300–24.9 µm
au = ls.fetch_refractiveindex("main", "Au", "Olmon-ts", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(au.range_nm)  # (300, 24930) nm
eps = au.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_97487dcc1ff6/lightsmith"
au = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(au.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (au/olmon-2012-ts).

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

Template-stripped gold

References

R. L. Olmon, B. Slovick, T. W. Johnson, D. Shelton, S.-H. Oh, G. D. Boreman, M. B. Raschke. Optical dielectric function of gold. Phys. Rev. B 86, 235147 (2012) (See Supplemental Material)

doi:10.1103/physrevb.86.235147 Optical dielectric function of gold, Physical Review B (2012)

Cite

Robert L. Olmon et al.. Optical dielectric function of gold. Physical Review B, 86, 235147 (2012), doi:10.1103/physrevb.86.235147; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

448 rows as published

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

Au (Gold), Olmon et al. 2012: Template-stripped gold; n,k 0.300–24.9 µm: n and k versus wavelength
λ (µm)	n	k
0.3	1.667	1.934
0.31	1.719	1.937
0.32	1.754	1.921
0.33	1.767	1.895
0.34	1.759	1.871
0.35	1.732	1.858
0.36	1.696	1.862
0.37	1.664	1.885
0.38	1.645	1.918
0.39	1.642	1.945
0.4	1.645	1.956
0.41	1.641	1.95
0.42	1.621	1.936
0.43	1.59	1.925
0.44	1.556	1.915
0.45	1.52	1.893
0.46	1.466	1.85
0.47	1.372	1.795
0.48	1.227	1.756
0.49	1.041	1.764
0.5	0.8463	1.836
0.51	0.678	1.962
0.52	0.5507	2.115
0.53	0.46	2.274
0.54	0.3953	2.427
0.55	0.3476	2.573
0.56	0.3111	2.71
0.57	0.2822	2.841
0.58	0.2587	2.966
0.59	0.2392	3.087
0.6	0.2228	3.203
0.61	0.209	3.316
0.62	0.1973	3.426
0.63	0.1874	3.534
0.64	0.1789	3.639
0.65	0.1717	3.742
0.66	0.1656	3.844
0.67	0.1604	3.943
0.68	0.1561	4.042
0.69	0.1524	4.138
0.7	0.1494	4.234
0.71	0.147	4.328
0.72	0.145	4.422
0.73	0.1435	4.514
0.74	0.1424	4.605
0.75	0.1416	4.696
0.76	0.1411	4.786
0.77	0.141	4.875
0.78	0.141	4.963
0.79	0.1414	5.05
0.8	0.1419	5.137
0.81	0.1426	5.224
0.82	0.1435	5.31
0.83	0.1445	5.395
0.84	0.1457	5.48
0.85	0.1471	5.565
0.86	0.1486	5.649
0.87	0.1501	5.732
0.88	0.1518	5.815
0.89	0.1536	5.898
0.9	0.1555	5.981
0.91	0.1575	6.063
0.92	0.1596	6.145
0.93	0.1617	6.227
0.94	0.1639	6.308
0.95	0.1662	6.389
0.96	0.1686	6.47
0.97	0.171	6.55
0.98	0.1734	6.63
0.99	0.176	6.711
1.0	0.1786	6.79
1.01	0.1812	6.87
1.02	0.1839	6.949
1.03	0.1866	7.029
1.04	0.1894	7.108
1.05	0.1923	7.186
1.06	0.1951	7.265
1.07	0.198	7.344
1.08	0.201	7.422
1.09	0.204	7.5
1.1	0.207	7.578
1.11	0.2101	7.656
1.12	0.2132	7.734
1.13	0.2163	7.811
1.14	0.2195	7.889
1.15	0.2227	7.966
1.16	0.226	8.043
1.17	0.2292	8.121
1.18	0.2325	8.198
1.19	0.2359	8.274
1.2	0.2392	8.351
1.21	0.2426	8.428
1.22	0.2461	8.504
1.23	0.2495	8.581
1.24	0.253	8.657
1.25	0.2565	8.733
1.26	0.26	8.809
1.27	0.2636	8.885
1.28	0.2672	8.961
1.29	0.2708	9.037
1.3	0.2744	9.113
1.31	0.2781	9.189
1.32	0.2813	9.262
1.33	0.2845	9.336
1.34	0.2878	9.41
1.35	0.291	9.483
1.43	0.3214	10.08
1.44	0.3249	10.15
1.45	0.3284	10.23
1.46	0.3319	10.3
1.47	0.3355	10.37
1.48	0.339	10.44
1.49	0.3426	10.51
1.5	0.3462	10.59
1.51	0.3498	10.66
1.52	0.3535	10.73
1.53	0.3571	10.8
1.54	0.3608	10.87
1.55	0.3646	10.94
1.56	0.3683	11.02
1.57	0.3721	11.09
1.58	0.3759	11.16
1.59	0.3797	11.23
1.6	0.3835	11.3
1.61	0.3874	11.37
1.62	0.3913	11.44
1.63	0.3952	11.51
1.64	0.3991	11.58
1.65	0.4031	11.66
1.66	0.4071	11.73
1.67	0.4112	11.8
1.68	0.4152	11.87
1.69	0.4193	11.94
1.7	0.4234	12.01
1.71	0.4276	12.08
1.72	0.4317	12.15
1.73	0.4359	12.22
1.74	0.4402	12.29
1.75	0.4444	12.36
1.76	0.4487	12.43
1.77	0.4531	12.5
1.78	0.4574	12.57
1.79	0.4618	12.64
1.8	0.4663	12.71
1.81	0.4708	12.78
1.82	0.4752	12.85
1.83	0.4798	12.92
1.84	0.4844	12.99
1.85	0.489	13.06
1.86	0.4936	13.13
1.87	0.4983	13.2
1.88	0.503	13.27
1.89	0.5078	13.34
1.9	0.5126	13.41
1.91	0.5175	13.48
1.92	0.5223	13.55
1.93	0.5273	13.62
1.94	0.5322	13.69
1.95	0.5373	13.75
1.96	0.5424	13.82
1.97	0.5474	13.89
1.98	0.5526	13.96
1.99	0.5578	14.03
2.0	0.5622	14.09
2.007	0.5667	14.15
2.019	0.5736	14.24
2.025	0.5771	14.28
2.038	0.5842	14.38
2.045	0.5878	14.42
2.058	0.5952	14.52
2.064	0.5989	14.56
2.077	0.6064	14.66
2.084	0.6102	14.71
2.098	0.618	14.8
2.104	0.6219	14.85
2.118	0.6299	14.95
2.125	0.6339	15.0
2.139	0.6421	15.1
2.146	0.6463	15.15
2.153	0.6505	15.2
2.168	0.6591	15.31
2.175	0.6634	15.36
2.19	0.6722	15.46
2.197	0.6767	15.52
2.205	0.6812	15.57
2.22	0.6903	15.68
2.227	0.695	15.73
2.235	0.6997	15.79
2.243	0.7044	15.84
2.258	0.7141	15.95
2.266	0.719	16.01
2.274	0.7239	16.07
2.282	0.7289	16.13
2.298	0.7391	16.24
2.307	0.7442	16.3
2.315	0.7494	16.36
2.323	0.7547	16.42
2.34	0.7654	16.54
2.348	0.7708	16.6
2.357	0.7763	16.66
2.365	0.7819	16.72
2.374	0.7875	16.78
2.383	0.7932	16.84
2.392	0.7989	16.91
2.409	0.8106	17.03
2.418	0.8165	17.1
2.427	0.8225	17.16
2.437	0.8286	17.23
2.446	0.8347	17.29
2.455	0.8409	17.36
2.464	0.8472	17.43
2.474	0.8535	17.49
2.483	0.8599	17.56
2.493	0.8664	17.63
2.502	0.873	17.7
2.512	0.8796	17.77
2.522	0.8863	17.84
2.532	0.8931	17.91
2.542	0.8999	17.98
2.552	0.9069	18.05
2.562	0.9139	18.12
2.572	0.921	18.19
2.582	0.9282	18.26
2.593	0.9355	18.34
2.603	0.9428	18.41
2.613	0.9503	18.49
2.624	0.9578	18.56
2.635	0.9655	18.64
2.645	0.9732	18.71
2.656	0.981	18.79
2.667	0.9889	18.87
2.678	0.9969	18.95
2.689	1.005	19.03
2.701	1.013	19.1
2.712	1.022	19.18
2.723	1.03	19.27
2.735	1.038	19.35
2.746	1.047	19.43
2.758	1.056	19.51
2.77	1.065	19.6
2.782	1.074	19.68
2.794	1.083	19.76
2.806	1.092	19.85
2.818	1.101	19.94
2.83	1.111	20.02
2.843	1.12	20.11
2.855	1.13	20.2
2.868	1.139	20.29
2.881	1.149	20.38
2.893	1.159	20.47
2.906	1.17	20.56
2.919	1.18	20.65
2.933	1.19	20.75
2.946	1.201	20.84
2.959	1.212	20.94
2.973	1.223	21.03
2.987	1.234	21.13
3.001	1.245	21.23
3.015	1.256	21.32
3.029	1.267	21.42
3.043	1.279	21.52
3.057	1.291	21.63
3.072	1.303	21.73
3.086	1.315	21.83
3.101	1.327	21.93
3.116	1.34	22.04
3.131	1.352	22.15
3.146	1.365	22.25
3.162	1.378	22.36
3.177	1.391	22.47
3.193	1.405	22.58
3.209	1.418	22.69
3.224	1.432	22.8
3.241	1.446	22.92
3.257	1.46	23.03
3.273	1.475	23.14
3.29	1.489	23.26
3.307	1.504	23.38
3.324	1.519	23.5
3.341	1.534	23.62
3.358	1.55	23.74
3.376	1.566	23.86
3.393	1.582	23.99
3.411	1.598	24.11
3.429	1.614	24.24
3.447	1.631	24.36
3.466	1.648	24.49
3.485	1.665	24.62
3.503	1.683	24.75
3.522	1.701	24.89
3.542	1.719	25.02
3.561	1.737	25.16
3.581	1.756	25.29
3.601	1.775	25.43
3.621	1.794	25.57
3.641	1.813	25.72
3.662	1.833	25.86
3.683	1.854	26.0
3.704	1.874	26.15
3.725	1.895	26.3
3.746	1.916	26.45
3.768	1.938	26.6
3.79	1.96	26.75
3.812	1.982	26.91
3.835	2.005	27.06
3.858	2.028	27.22
3.881	2.052	27.38
3.904	2.076	27.54
3.928	2.1	27.71
3.952	2.125	27.87
3.976	2.15	28.04
4.001	2.176	28.21
4.026	2.202	28.38
4.051	2.228	28.56
4.076	2.255	28.73
4.102	2.283	28.91
4.128	2.311	29.09
4.155	2.34	29.27
4.181	2.369	29.46
4.209	2.398	29.64
4.236	2.429	29.83
4.264	2.459	30.02
4.292	2.491	30.22
4.321	2.523	30.41
4.35	2.555	30.61
4.379	2.589	30.82
4.409	2.622	31.02
4.439	2.657	31.23
4.47	2.692	31.44
4.501	2.728	31.65
4.532	2.765	31.86
4.564	2.802	32.08
4.597	2.84	32.3
4.629	2.879	32.53
4.663	2.919	32.75
4.697	2.959	32.98
4.731	3.0	33.22
4.766	3.043	33.45
4.801	3.086	33.69
4.837	3.13	33.94
4.873	3.174	34.18
4.91	3.22	34.43
4.947	3.267	34.69
4.986	3.315	34.94
5.024	3.364	35.2
5.063	3.414	35.47
5.103	3.465	35.74
5.144	3.517	36.01
5.185	3.571	36.29
5.227	3.625	36.57
5.269	3.681	36.85
5.312	3.738	37.14
5.356	3.797	37.44
5.401	3.856	37.74
5.446	3.918	38.04
5.493	3.98	38.35
5.539	4.044	38.66
5.587	4.11	38.98
5.636	4.177	39.3
5.685	4.246	39.63
5.736	4.317	39.97
5.787	4.389	40.31
5.839	4.463	40.65
5.892	4.539	41.0
5.946	4.617	41.36
6.001	4.696	41.72
6.057	4.778	42.09
6.114	4.862	42.47
6.173	4.948	42.85
6.232	5.037	43.24
6.292	5.127	43.63
6.354	5.22	44.04
6.417	5.316	44.45
6.481	5.414	44.86
6.547	5.515	45.29
6.613	5.619	45.72
6.682	5.725	46.16
6.751	5.835	46.61
6.822	5.947	47.07
6.895	6.063	47.54
6.969	6.182	48.01
7.045	6.304	48.5
7.122	6.43	48.99
7.201	6.56	49.49
7.282	6.693	50.01
7.365	6.831	50.53
7.45	6.972	51.07
7.536	7.118	51.62
7.625	7.269	52.17
7.716	7.424	52.74
7.809	7.584	53.32
7.904	7.748	53.92
8.001	7.919	54.53
8.101	8.094	55.15
8.204	8.275	55.78
8.309	8.462	56.43
8.417	8.655	57.09
8.528	8.855	57.77
8.642	9.061	58.46
8.758	9.274	59.17
8.878	9.495	59.9
9.002	9.722	60.64
9.128	9.958	61.4
9.259	10.2	62.18
9.393	10.46	62.98
9.531	10.72	63.8
9.673	10.99	64.64
9.82	11.27	65.5
9.971	11.56	66.38
10.13	11.86	67.28
10.29	12.17	68.21
10.45	12.5	69.17
10.63	12.84	70.15
10.8	13.19	71.15
10.99	13.55	72.19
11.17	13.93	73.25
11.37	14.32	74.34
11.57	14.73	75.47
11.78	15.15	76.62
12.0	15.59	77.82
12.23	16.05	79.04
12.46	16.53	80.31
12.71	17.03	81.62
12.96	17.54	82.96
13.23	18.08	84.35
13.5	18.65	85.78
13.79	19.23	87.27
14.09	19.84	88.8
14.4	20.48	90.38
14.73	21.15	92.02
15.07	21.84	93.72
15.43	22.57	95.48
15.81	23.32	97.31
16.2	24.11	99.21
16.62	24.94	101.2
17.06	25.8	103.2
17.52	26.7	105.4
18.0	27.65	107.6
18.52	28.63	109.9
19.06	29.66	112.3
19.64	30.74	114.9
20.25	31.86	117.5
20.91	33.04	120.3
21.6	34.27	123.3
22.35	35.55	126.4
23.15	36.9	129.6
24.0	38.3	133.1
24.93	39.76	136.8

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: —

Plot