At one wavelength

Refractive index n: 1.71552
Extinction coefficient k: 0.85808

Permittivity ε₁: 2.20671
Permittivity ε₂: 2.94411

Absorption coefficient α: 183508 cm⁻¹
Penetration depth δ = λ/(2πk): 108.987 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: 0.2 µm⁻¹

Group index n_g: 1.598
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

# C (Carbon, diamond, graphite, graphene, carbon nanotubes): Querry 1985: Intercalated graphite pellet, Dixon 1102; n,k 0.20–55.6 µm
c = ls.fetch_refractiveindex("main", "C", "Querry-Dixon1102", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c.range_nm)  # (200, 55555.6) nm
eps = c.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_becef363089b/lightsmith"
c = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (c/querry-1985-dixon1102).

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

Intercalated graphite pellet from Dixon 1102 powder.

References

M. R. Querry. Optical constants, Contractor Report CRDC-CR-85034 (1985)

Cite

M. R. Querry. Optical constants, Contractor Report CRDC-CR-85034 (1985); Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

613 rows as published

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

C (Carbon, diamond, graphite, graphene, carbon nanotubes), Querry 1985: Intercalated graphite pellet, Dixon 1102; n,k 0.20–55.6 µm: n and k versus wavelength
λ (µm)	n	k
0.2	0.855	0.663
0.21	0.915	0.766
0.22	0.976	0.871
0.23	1.06	0.968
0.24	1.177	1.052
0.25	1.331	1.092
0.26	1.477	1.057
0.27	1.565	0.984
0.28	1.61	0.919
0.29	1.633	0.868
0.3	1.645	0.829
0.31	1.65	0.799
0.32	1.651	0.78
0.33	1.655	0.767
0.34	1.657	0.752
0.35	1.653	0.743
0.36	1.65	0.741
0.37	1.65	0.742
0.38	1.653	0.744
0.39	1.656	0.746
0.4	1.659	0.747
0.41	1.661	0.749
0.42	1.662	0.752
0.43	1.664	0.756
0.44	1.665	0.762
0.45	1.668	0.768
0.46	1.671	0.775
0.47	1.675	0.782
0.48	1.679	0.789
0.49	1.684	0.795
0.5	1.688	0.801
0.51	1.692	0.807
0.52	1.695	0.813
0.53	1.699	0.819
0.54	1.702	0.826
0.55	1.705	0.832
0.56	1.709	0.839
0.57	1.712	0.845
0.58	1.714	0.852
0.59	1.716	0.86
0.6	1.718	0.868
0.61	1.721	0.876
0.62	1.724	0.884
0.63	1.726	0.894
0.64	1.733	0.903
0.65	1.737	0.908
0.66	1.737	0.916
0.67	1.74	0.926
0.68	1.743	0.935
0.69	1.747	0.945
0.7	1.751	0.953
0.71	1.755	0.962
0.72	1.759	0.971
0.73	1.763	0.979
0.74	1.767	0.986
0.75	1.77	0.996
0.76	1.773	1.005
0.77	1.778	1.014
0.78	1.782	1.022
0.79	1.786	1.03
0.8	1.788	1.037
0.81	1.789	1.047
0.82	1.793	1.056
0.83	1.796	1.066
0.84	1.8	1.076
0.85	1.803	1.086
0.86	1.808	1.096
0.87	1.813	1.106
0.88	1.818	1.115
0.89	1.823	1.124
0.9	1.827	1.132
0.91	1.83	1.141
0.92	1.835	1.151
0.93	1.839	1.16
0.94	1.834	1.169
0.95	1.848	1.178
0.96	1.853	1.186
0.97	1.857	1.195
0.98	1.861	1.204
0.99	1.865	1.214
1.0	1.87	1.223
1.01	1.874	1.232
1.02	1.878	1.24
1.03	1.883	1.25
1.04	1.887	1.259
1.05	1.891	1.268
1.06	1.896	1.276
1.07	1.901	1.287
1.08	1.906	1.296
1.09	1.911	1.306
1.1	1.916	1.314
1.11	1.921	1.323
1.12	1.925	1.333
1.13	1.931	1.342
1.14	1.936	1.351
1.15	1.941	1.36
1.16	1.947	1.369
1.17	1.952	1.378
1.18	1.957	1.387
1.19	1.963	1.396
1.2	1.967	1.404
1.21	1.972	1.415
1.22	1.978	1.423
1.23	1.985	1.432
1.24	1.991	1.441
1.25	1.997	1.45
1.26	2.003	1.458
1.27	2.008	1.467
1.28	2.015	1.475
1.29	2.021	1.484
1.3	2.027	1.492
1.31	2.034	1.5
1.32	2.04	1.508
1.33	2.046	1.515
1.34	2.052	1.523
1.35	2.058	1.531
1.36	2.064	1.539
1.37	2.069	1.547
1.38	2.076	1.554
1.39	2.082	1.562
1.4	2.088	1.57
1.41	2.094	1.577
1.42	2.101	1.585
1.43	2.106	1.592
1.44	2.113	1.6
1.45	2.118	1.608
1.46	2.125	1.616
1.47	2.132	1.623
1.48	2.139	1.631
1.49	2.146	1.637
1.5	2.153	1.644
1.51	2.16	1.65
1.52	2.166	1.656
1.53	2.172	1.66
1.54	2.176	1.667
1.55	2.183	1.675
1.56	2.189	1.681
1.57	2.196	1.688
1.58	2.202	1.692
1.59	2.206	1.699
1.6	2.213	1.707
1.61	2.219	1.713
1.62	2.225	1.719
1.63	2.23	1.725
1.64	2.236	1.731
1.65	2.242	1.738
1.66	2.248	1.744
1.67	2.254	1.751
1.68	2.26	1.756
1.69	2.266	1.762
1.7	2.271	1.768
1.71	2.277	1.775
1.72	2.283	1.781
1.736	2.289	1.787
1.74	2.295	1.793
1.75	2.301	1.8
1.7662	2.308	1.806
1.77	2.314	1.812
1.78	2.321	1.817
1.79	2.328	1.823
1.8	2.335	1.827
1.81	2.34	1.831
1.82	2.345	1.836
1.83	2.352	1.843
1.84	2.359	1.848
1.85	2.366	1.851
1.86	2.372	1.853
1.87	2.375	1.857
1.88	2.378	1.863
1.89	2.385	1.869
1.9	2.391	1.873
1.91	2.394	1.877
1.92	2.4	1.883
1.93	2.406	1.887
1.94	2.41	1.892
1.95	2.415	1.898
1.96	2.421	1.902
1.97	2.426	1.906
1.98	2.43	1.912
1.99	2.438	1.916
2.0	2.441	1.918
2.01	2.444	1.924
2.02	2.45	1.929
2.03	2.455	1.933
2.04	2.459	1.938
2.05	2.464	1.942
2.06	2.469	1.947
2.07	2.474	1.951
2.08	2.479	1.955
2.09	2.483	1.96
2.1	2.487	1.964
2.11	2.491	1.968
2.12	2.496	1.972
2.13	2.5	1.976
2.14	2.503	1.981
2.15	2.507	1.984
2.16	2.51	1.99
2.17	2.515	1.994
2.18	2.518	1.999
2.19	2.522	2.003
2.2	2.525	2.009
2.21	2.53	2.014
2.22	2.534	2.018
2.23	2.537	2.024
2.24	2.542	2.029
2.25	2.546	2.033
2.26	2.549	2.037
2.27	2.552	2.043
2.28	2.556	2.047
2.29	2.559	2.052
2.3	2.563	2.058
2.31	2.567	2.064
2.32	2.571	2.068
2.33	2.575	2.074
2.34	2.579	2.079
2.35	2.583	2.084
2.36	2.587	2.089
2.37	2.591	2.094
2.38	2.594	2.099
2.39	2.597	2.104
2.4	2.601	2.114
2.41	2.61	2.116
2.42	2.608	2.12
2.43	2.613	2.129
2.44	2.62	2.135
2.45	2.624	2.14
2.46	2.63	2.147
2.47	2.638	2.152
2.48	2.644	2.154
2.49	2.649	2.156
2.5	2.653	2.16
2.5063	2.656	2.161
2.5126	2.657	2.162
2.5189	2.658	2.165
2.5253	2.659	2.168
2.5316	2.661	2.172
2.5381	2.663	2.176
2.5445	2.667	2.179
2.551	2.669	2.181
2.5575	2.67	2.185
2.5641	2.675	2.189
2.5707	2.678	2.192
2.5773	2.681	2.192
2.584	2.682	2.195
2.5907	2.683	2.199
2.5974	2.686	2.204
2.6042	2.691	2.206
2.611	2.693	2.207
2.6178	2.693	2.21
2.6247	2.694	2.215
2.6316	2.697	2.22
2.6385	2.702	2.223
2.6455	2.704	2.226
2.6525	2.706	2.228
2.6596	2.7	2.233
2.6667	2.71	2.237
2.6738	2.715	2.24
2.681	2.717	2.242
2.6882	2.718	2.246
2.6954	2.721	2.251
2.7027	2.724	2.256
2.71	2.728	2.259
2.7174	2.731	2.262
2.7248	2.733	2.264
2.7322	2.735	2.269
2.7397	2.738	2.274
2.7473	2.742	2.278
2.7548	2.745	2.282
2.7624	2.749	2.287
2.7701	2.753	2.289
2.7778	2.756	2.291
2.7855	2.757	2.295
2.7933	2.759	2.301
2.8011	2.764	2.306
2.809	2.769	2.309
2.8169	2.773	2.312
2.8249	2.774	2.314
2.8329	2.777	2.319
2.8409	2.78	2.324
2.849	2.784	2.328
2.8571	2.78	2.331
2.8653	2.791	2.335
2.8736	2.794	2.339
2.8818	2.798	2.343
2.8902	2.801	2.346
2.8986	2.804	2.351
2.907	2.808	2.355
2.9155	2.811	2.359
2.924	2.815	2.364
2.9326	2.818	2.369
2.9412	2.824	2.373
2.9499	2.83	2.376
2.9586	2.833	2.377
2.9674	2.833	2.38
2.9762	2.836	2.387
2.9851	2.842	2.393
2.994	2.847	2.394
3.003	2.849	2.397
3.012	2.853	2.403
3.0211	2.858	2.407
3.0303	2.861	2.409
3.0395	2.864	2.414
3.0488	2.867	2.418
3.0581	2.872	2.422
3.0675	2.875	2.425
3.0769	2.877	2.43
3.0864	2.881	2.437
3.096	2.887	2.442
3.1056	2.892	2.444
3.1153	2.895	2.448
3.125	2.899	2.453
3.1348	2.904	2.456
3.1447	2.907	2.459
3.1546	2.91	2.464
3.1646	2.914	2.47
3.1746	2.92	2.475
3.1847	2.925	2.479
3.1949	2.93	2.483
3.2051	2.934	2.485
3.2154	2.936	2.489
3.2258	2.94	2.495
3.2362	2.946	2.501
3.2468	2.952	2.504
3.2573	2.956	2.507
3.268	2.96	2.51
3.2787	2.965	2.515
3.2895	2.969	2.518
3.3003	2.974	2.521
3.3113	2.976	2.524
3.3223	2.979	2.531
3.3333	2.984	2.535
3.3445	2.99	2.54
3.3557	2.993	2.542
3.367	2.996	2.546
3.3784	3.002	2.55
3.3898	3.004	2.554
3.4014	3.007	2.559
3.413	3.011	2.565
3.4247	3.017	2.571
3.4364	3.022	2.572
3.4483	3.024	2.577
3.4602	3.028	2.582
3.4722	3.032	2.588
3.4843	3.037	2.593
3.4965	3.041	2.598
3.5088	3.045	2.602
3.5211	3.049	2.608
3.5336	3.054	2.614
3.5461	3.06	2.618
3.5587	3.065	2.623
3.5714	3.069	2.627
3.5842	3.075	2.633
3.5971	3.08	2.635
3.6101	3.082	2.639
3.6232	3.084	2.644
3.6364	3.088	2.652
3.6496	3.095	2.658
3.663	3.1	2.662
3.6765	3.104	2.665
3.69	3.106	2.672
3.7037	3.112	2.679
3.7175	3.117	2.683
3.7313	3.121	2.687
3.7453	3.124	2.694
3.7594	3.129	2.7
3.7736	3.135	2.706
3.7879	3.138	2.711
3.8023	3.142	2.719
3.8168	3.148	2.725
3.8314	3.153	2.731
3.8462	3.158	2.737
3.861	3.163	2.745
3.876	3.171	2.751
3.8911	3.175	2.755
3.9063	3.178	2.761
3.9216	3.184	2.769
3.937	3.191	2.777
3.9526	3.198	2.781
3.9683	3.202	2.786
3.9841	3.206	2.794
4.0	3.212	2.801
4.0161	3.218	2.808
4.0323	3.224	2.814
4.0486	3.23	2.822
4.065	3.238	2.829
4.0816	3.245	2.834
4.0984	3.252	2.838
4.1152	3.256	2.844
4.1322	3.261	2.853
4.1494	3.269	2.861
4.1667	3.278	2.866
4.1841	3.284	2.87
4.2017	3.289	2.874
4.2194	3.296	2.879
4.2373	3.299	2.885
4.2553	3.304	2.893
4.2735	3.31	2.9
4.2918	3.316	2.907
4.3103	3.319	2.911
4.329	3.323	2.922
4.3478	3.331	2.932
4.3668	3.339	2.938
4.386	3.346	2.944
4.4053	3.351	2.951
4.4248	3.355	2.96
4.4444	3.362	2.969
4.4643	3.369	2.978
4.4843	3.378	2.985
4.5045	3.384	2.992
4.5249	3.39	3.001
4.5455	3.396	3.01
4.5662	3.405	3.021
4.5872	3.414	3.03
4.6083	3.425	3.038
4.6296	3.434	3.042
4.6512	3.442	3.048
4.6729	3.447	3.055
4.6948	3.453	3.065
4.717	3.462	3.074
4.7393	3.47	3.083
4.7619	3.478	3.091
4.7847	3.485	3.1
4.8077	3.495	3.11
4.8309	3.505	3.119
4.8544	3.514	3.126
4.878	3.524	3.134
4.902	3.534	3.143
4.9261	3.544	3.15
4.9505	3.553	3.157
4.9751	3.563	3.165
5.0	3.571	3.173
5.0251	3.58	3.181
5.0505	3.59	3.189
5.0761	3.599	3.197
5.102	3.608	3.204
5.1282	3.618	3.213
5.1546	3.629	3.221
5.1813	3.638	3.227
5.2083	3.646	3.235
5.2356	3.655	3.245
5.2632	3.666	3.255
5.291	3.677	3.263
5.3191	3.688	3.271
5.3476	3.699	3.28
5.3763	3.71	3.287
5.4054	3.722	3.295
5.4348	3.734	3.301
5.4645	3.744	3.306
5.4945	3.752	3.313
5.5249	3.762	3.322
5.5556	3.772	3.33
5.5866	3.783	3.338
5.618	3.793	3.345
5.6497	3.802	3.351
5.6818	3.81	3.36
5.7143	3.821	3.372
5.7471	3.832	3.38
5.7803	3.845	3.386
5.814	3.853	3.394
5.848	3.865	3.405
5.8824	3.877	3.412
5.9172	3.89	3.421
5.9524	3.901	3.425
5.988	3.912	3.432
6.0241	3.92	3.438
6.0606	3.928	3.446
6.0976	3.937	3.454
6.135	3.946	3.464
6.1728	3.956	3.47
6.2112	3.955	3.477
6.25	3.956	3.502
6.2893	3.975	3.532
6.3291	4.011	3.547
6.3694	4.04	3.539
6.4103	4.047	3.534
6.4516	4.053	3.537
6.4935	4.06	3.545
6.5359	4.07	3.554
6.5789	4.08	3.561
6.6225	4.091	3.57
6.6667	4.1	3.576
6.7114	4.108	3.584
6.7568	4.116	3.595
6.8027	4.128	3.606
6.8493	4.139	3.613
6.8966	4.148	3.621
6.9444	4.155	3.631
6.993	4.165	3.644
7.0423	4.175	3.655
7.0922	4.187	3.665
7.1429	4.197	3.674
7.1942	4.206	3.683
7.2464	4.214	3.694
7.2993	4.224	3.707
7.3529	4.234	3.716
7.4074	4.24	3.725
7.4627	4.247	3.738
7.5188	4.25	3.753
7.5758	4.259	3.769
7.6336	4.268	3.784
7.6923	4.276	3.799
7.7519	4.282	3.811
7.8125	4.285	3.827
7.874	4.287	3.85
7.9365	4.292	3.877
8.0	4.303	3.907
8.0645	4.32	3.933
8.1301	4.336	3.957
8.1967	4.353	3.979
8.2645	4.368	4.003
8.3333	4.387	4.029
8.4034	4.408	4.05
8.4746	4.426	4.071
8.547	4.44	4.092
8.6207	4.454	4.119
8.6957	4.471	4.149
8.7719	4.492	4.185
8.8496	4.522	4.224
8.9286	4.564	4.26
9.009	4.616	4.286
9.0909	4.669	4.298
9.1743	4.717	4.299
9.2593	4.758	4.29
9.3458	4.788	4.282
9.434	4.816	4.272
9.5238	4.832	4.262
9.6154	4.848	4.255
9.7087	4.856	4.25
9.8039	4.86	4.249
9.901	4.861	4.251
10.0	4.859	4.261
10.101	4.859	4.278
10.2041	4.863	4.293
10.3093	4.87	4.318
10.4167	4.877	4.338
10.5263	4.884	4.362
10.6383	4.895	4.385
10.7527	4.907	4.406
10.8696	4.916	4.428
10.989	4.924	4.452
11.1111	4.933	4.478
11.236	4.943	4.505
11.3636	4.95	4.534
11.4943	4.959	4.569
11.6279	4.974	4.606
11.7647	4.995	4.64
11.9048	5.01	4.668
12.0482	5.026	4.702
12.1951	5.043	4.737
12.3457	5.066	4.773
12.5	5.09	4.8
12.6582	5.105	4.829
12.8205	5.12	4.859
12.987	5.136	4.893
13.1579	5.15	4.925
13.3333	5.159	4.961
13.5135	5.171	5.003
13.6986	5.188	5.047
13.8889	5.206	5.086
14.0845	5.222	5.127
14.2857	5.234	5.167
14.4928	5.243	5.215
14.7059	5.253	5.263
14.9254	5.265	5.315
15.1515	5.277	5.368
15.3846	5.274	5.42
15.625	5.275	5.495
15.873	5.29	5.581
16.129	5.319	5.67
16.3934	5.359	5.735
16.6667	5.383	5.806
16.9492	5.408	5.878
17.2414	5.432	5.954
17.5439	5.46	6.035
17.8571	5.484	6.116
18.1818	5.508	6.203
18.5185	5.532	6.292
18.8679	5.549	6.39
19.2308	5.569	6.499
19.6078	5.591	6.62
20.0	5.616	6.76
20.4082	5.669	6.919
20.8333	5.751	7.074
21.2766	5.853	7.207
21.7391	5.954	7.316
22.2222	6.04	7.414
22.7273	6.103	7.51
23.2558	6.151	7.626
23.8095	6.204	7.767
24.3902	6.261	7.914
25.0	6.324	8.074
25.641	6.39	8.247
26.3158	6.459	8.437
27.027	6.549	8.637
27.7778	6.65	8.848
28.5714	6.754	9.058
29.4118	6.858	9.289
30.303	6.978	9.547
31.25	7.118	9.817
32.2581	7.275	10.094
33.3333	7.444	10.388
34.4828	7.636	10.702
35.7143	7.834	11.029
37.037	8.055	11.369
38.4615	8.243	11.782
40.0	8.548	12.301
41.6667	8.953	12.758
43.4783	9.368	13.234
45.4545	9.814	13.75
47.619	10.351	14.402
50.0	11.136	15.051
52.6316	12.061	15.672
55.5556	13.242	16.188

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