At one wavelength

Refractive index n: 1.62628
Extinction coefficient k: 0.75136

Permittivity ε₁: 2.08024
Permittivity ε₂: 2.44384

Absorption coefficient α: 160685 cm⁻¹
Penetration depth δ = λ/(2πk): 124.467 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: 0.3 µm⁻¹

Group index n_g: 1.45
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: Pyrolytic carbon; n,k 0.21–55.6 µm
c = ls.fetch_refractiveindex("main", "C", "Querry-Pyrolytic", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c.range_nm)  # (210, 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_73fec75fa379/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-pyrolytic).

# ... 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

Pyrolytic carbon (pyrolytic graphite).

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

612 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: Pyrolytic carbon; n,k 0.21–55.6 µm: n and k versus wavelength
λ (µm)	n	k
0.21	1.248	0.411
0.22	1.293	0.503
0.23	1.361	0.564
0.24	1.445	0.601
0.25	1.532	0.603
0.26	1.607	0.569
0.27	1.643	0.511
0.28	1.64	0.466
0.29	1.626	0.445
0.3	1.613	0.436
0.31	1.6	0.434
0.32	1.589	0.439
0.33	1.583	0.447
0.34	1.577	0.454
0.35	1.57	0.465
0.36	1.567	0.47
0.37	1.565	0.491
0.38	1.564	0.504
0.39	1.565	0.517
0.4	1.565	0.529
0.41	1.566	0.542
0.42	1.567	0.556
0.43	1.568	0.569
0.44	1.571	0.583
0.45	1.574	0.596
0.46	1.577	0.61
0.47	1.581	0.623
0.48	1.586	0.636
0.49	1.591	0.648
0.5	1.596	0.659
0.51	1.6	0.669
0.52	1.605	0.68
0.53	1.608	0.69
0.54	1.612	0.7
0.55	1.615	0.711
0.56	1.618	0.721
0.57	1.622	0.732
0.58	1.624	0.743
0.59	1.627	0.754
0.6	1.63	0.765
0.61	1.634	0.777
0.62	1.637	0.788
0.63	1.64	0.8
0.64	1.646	0.814
0.65	1.651	0.822
0.66	1.653	0.832
0.67	1.657	0.844
0.68	1.661	0.855
0.69	1.666	0.866
0.7	1.67	0.877
0.71	1.675	0.888
0.72	1.68	0.898
0.73	1.684	0.909
0.74	1.689	0.919
0.75	1.693	0.929
0.76	1.697	0.94
0.77	1.702	0.95
0.78	1.706	0.96
0.79	1.711	0.97
0.8	1.716	0.979
0.81	1.718	0.988
0.82	1.721	0.999
0.83	1.725	1.011
0.84	1.731	1.022
0.85	1.736	1.032
0.86	1.741	1.044
0.87	1.748	1.054
0.88	1.754	1.062
0.89	1.758	1.07
0.9	1.762	1.08
0.91	1.768	1.09
0.92	1.773	1.098
0.93	1.778	1.107
0.94	1.783	1.116
0.95	1.787	1.124
0.96	1.792	1.132
0.97	1.796	1.141
0.98	1.8	1.149
0.99	1.804	1.158
1.0	1.807	1.167
1.01	1.811	1.176
1.02	1.815	1.185
1.03	1.819	1.194
1.04	1.823	1.204
1.05	1.827	1.213
1.06	1.831	1.222
1.07	1.836	1.231
1.08	1.84	1.24
1.09	1.844	1.249
1.1	1.848	1.257
1.11	1.852	1.266
1.12	1.856	1.275
1.13	1.859	1.284
1.14	1.863	1.293
1.15	1.867	1.302
1.16	1.871	1.311
1.17	1.874	1.321
1.18	1.878	1.329
1.19	1.88	1.338
1.2	1.882	1.352
1.21	1.891	1.366
1.22	1.898	1.374
1.23	1.904	1.382
1.24	1.909	1.39
1.25	1.914	1.399
1.26	1.92	1.407
1.27	1.925	1.416
1.28	1.93	1.424
1.29	1.935	1.432
1.3	1.94	1.44
1.31	1.945	1.448
1.32	1.949	1.456
1.33	1.954	1.465
1.34	1.958	1.473
1.35	1.962	1.482
1.36	1.967	1.49
1.37	1.971	1.499
1.38	1.976	1.508
1.39	1.981	1.516
1.4	1.986	1.524
1.41	1.99	1.533
1.42	1.996	1.543
1.43	2.001	1.551
1.44	2.006	1.559
1.45	2.012	1.567
1.46	2.017	1.576
1.47	2.022	1.584
1.48	2.028	1.591
1.49	2.032	1.6
1.5	2.038	1.608
1.51	2.043	1.616
1.52	2.05	1.624
1.53	2.055	1.63
1.54	2.059	1.638
1.55	2.066	1.646
1.56	2.071	1.652
1.57	2.076	1.66
1.58	2.081	1.666
1.59	2.085	1.673
1.6	2.09	1.68
1.61	2.094	1.687
1.62	2.097	1.694
1.63	2.101	1.702
1.64	2.105	1.71
1.65	2.108	1.72
1.66	2.116	1.73
1.67	2.124	1.735
1.68	2.127	1.741
1.69	2.132	1.749
1.7	2.137	1.757
1.71	2.141	1.765
1.72	2.146	1.772
1.73	2.151	1.78
1.74	2.157	1.788
1.75	2.162	1.795
1.76	2.168	1.802
1.77	2.174	1.809
1.78	2.179	1.817
1.79	2.184	1.824
1.8	2.191	1.831
1.81	2.197	1.836
1.82	2.202	1.841
1.83	2.207	1.848
1.84	2.212	1.854
1.85	2.217	1.861
1.86	2.223	1.864
1.87	2.224	1.868
1.88	2.227	1.877
1.89	2.232	1.884
1.9	2.236	1.89
1.91	2.239	1.896
1.92	2.243	1.903
1.93	2.247	1.91
1.94	2.251	1.918
1.95	2.255	1.925
1.96	2.26	1.931
1.97	2.263	1.937
1.98	2.266	1.944
1.99	2.266	1.95
2.0	2.266	1.965
2.01	2.277	1.979
2.02	2.286	1.985
2.03	2.293	1.991
2.04	2.299	1.997
2.05	2.305	2.003
2.06	2.311	2.009
2.07	2.316	2.015
2.08	2.321	2.021
2.09	2.327	2.026
2.1	2.331	2.032
2.11	2.336	2.038
2.12	2.341	2.045
2.13	2.345	2.051
2.14	2.35	2.056
2.15	2.354	2.062
2.16	2.358	2.069
2.17	2.363	2.075
2.18	2.367	2.081
2.19	2.372	2.087
2.2	2.376	2.093
2.21	2.379	2.1
2.22	2.383	2.107
2.23	2.387	2.114
2.24	2.391	2.121
2.25	2.394	2.129
2.26	2.4	2.138
2.27	2.406	2.145
2.28	2.412	2.153
2.29	2.419	2.16
2.3	2.426	2.165
2.31	2.431	2.17
2.32	2.436	2.175
2.33	2.44	2.182
2.34	2.445	2.189
2.35	2.45	2.196
2.36	2.456	2.202
2.37	2.462	2.208
2.38	2.466	2.214
2.39	2.472	2.22
2.4	2.477	2.226
2.41	2.482	2.232
2.42	2.487	2.238
2.43	2.492	2.245
2.44	2.498	2.253
2.45	2.504	2.26
2.46	2.512	2.267
2.47	2.521	2.273
2.48	2.53	2.279
2.49	2.542	2.285
2.5	2.573	2.269
2.5063	2.551	2.264
2.5126	2.548	2.268
2.5189	2.547	2.271
2.5253	2.545	2.276
2.5316	2.546	2.282
2.5381	2.549	2.287
2.5445	2.552	2.291
2.551	2.554	2.293
2.5575	2.555	2.297
2.5641	2.556	2.301
2.5707	2.559	2.306
2.5773	2.562	2.311
2.584	2.565	2.315
2.5907	2.568	2.318
2.5974	2.571	2.322
2.6042	2.572	2.327
2.611	2.576	2.331
2.6178	2.58	2.334
2.6247	2.582	2.338
2.6316	2.586	2.341
2.6385	2.587	2.344
2.6455	2.589	2.348
2.6525	2.59	2.354
2.6596	2.593	2.36
2.6667	2.597	2.365
2.6738	2.602	2.37
2.681	2.607	2.373
2.6882	2.61	2.376
2.6954	2.612	2.378
2.7027	2.614	2.383
2.71	2.615	2.388
2.7174	2.619	2.395
2.7248	2.626	2.399
2.7322	2.63	2.402
2.7397	2.633	2.405
2.7473	2.635	2.409
2.7548	2.639	2.413
2.7624	2.642	2.418
2.7701	2.646	2.421
2.7778	2.648	2.426
2.7855	2.652	2.431
2.7933	2.655	2.435
2.8011	2.659	2.44
2.809	2.661	2.445
2.8169	2.667	2.45
2.8249	2.671	2.453
2.8329	2.675	2.457
2.8409	2.676	2.461
2.849	2.682	2.466
2.8571	2.685	2.47
2.8653	2.689	2.476
2.8736	2.694	2.48
2.8818	2.698	2.484
2.8902	2.701	2.486
2.8986	2.703	2.493
2.907	2.708	2.498
2.9155	2.713	2.503
2.924	2.718	2.506
2.9326	2.721	2.509
2.9412	2.725	2.513
2.9499	2.728	2.517
2.9586	2.731	2.521
2.9674	2.734	2.527
2.9762	2.739	2.532
2.9851	2.742	2.537
2.994	2.746	2.543
3.003	2.751	2.548
3.012	2.756	2.552
3.0211	2.759	2.557
3.0303	2.765	2.563
3.0395	2.771	2.567
3.0488	2.776	2.569
3.0581	2.778	2.573
3.0675	2.782	2.579
3.0769	2.786	2.583
3.0864	2.791	2.588
3.096	2.795	2.592
3.1056	2.799	2.597
3.1153	2.803	2.602
3.125	2.808	2.607
3.1348	2.811	2.612
3.1447	2.815	2.617
3.1546	2.822	2.621
3.1646	2.826	2.626
3.1746	2.83	2.629
3.1847	2.833	2.636
3.1949	2.839	2.642
3.2051	2.845	2.647
3.2154	2.85	2.649
3.2258	2.853	2.654
3.2362	2.856	2.659
3.2468	2.864	2.665
3.2573	2.869	2.668
3.268	2.873	2.673
3.2787	2.877	2.676
3.2895	2.88	2.681
3.3003	2.884	2.686
3.3113	2.888	2.692
3.3223	2.893	2.698
3.3333	2.899	2.703
3.3445	2.903	2.707
3.3557	2.907	2.712
3.367	2.911	2.718
3.3784	2.916	2.724
3.3898	2.921	2.727
3.4014	2.923	2.733
3.413	2.928	2.74
3.4247	2.934	2.748
3.4364	2.942	2.752
3.4483	2.946	2.756
3.4602	2.951	2.762
3.4722	2.956	2.767
3.4843	2.962	2.773
3.4965	2.966	2.777
3.5088	2.971	2.783
3.5211	2.976	2.788
3.5336	2.982	2.794
3.5461	2.987	2.797
3.5587	2.991	2.803
3.5714	2.994	2.808
3.5842	3.0	2.817
3.5971	3.006	2.821
3.6101	3.011	2.827
3.6232	3.015	2.833
3.6364	3.021	2.84
3.6496	3.027	2.845
3.663	3.033	2.851
3.6765	3.038	2.856
3.69	3.043	2.861
3.7037	3.047	2.868
3.7175	3.052	2.875
3.7313	3.057	2.882
3.7453	3.065	2.888
3.7594	3.071	2.894
3.7736	3.076	2.9
3.7879	3.082	2.906
3.8023	3.089	2.912
3.8168	3.095	2.918
3.8314	3.101	2.922
3.8462	3.106	2.927
3.861	3.109	2.934
3.876	3.114	2.943
3.8911	3.122	2.949
3.9063	3.127	2.955
3.9216	3.132	2.962
3.937	3.138	2.969
3.9526	3.146	2.977
3.9683	3.152	2.982
3.9841	3.157	2.989
4.0	3.165	2.995
4.0161	3.17	3.002
4.0323	3.177	3.009
4.0486	3.183	3.017
4.065	3.19	3.024
4.0816	3.198	3.028
4.0984	3.205	3.034
4.1152	3.21	3.039
4.1322	3.214	3.045
4.1494	3.219	3.054
4.1667	3.225	3.064
4.1841	3.235	3.073
4.2017	3.245	3.077
4.2194	3.251	3.08
4.2373	3.254	3.086
4.2553	3.259	3.093
4.2735	3.266	3.101
4.2918	3.272	3.107
4.3103	3.275	3.115
4.329	3.28	3.124
4.3478	3.285	3.134
4.3668	3.294	3.145
4.386	3.302	3.153
4.4053	3.312	3.16
4.4248	3.318	3.166
4.4444	3.324	3.174
4.4643	3.331	3.181
4.4843	3.337	3.191
4.5045	3.345	3.199
4.5249	3.352	3.208
4.5455	3.361	3.217
4.5662	3.368	3.225
4.5872	3.377	3.231
4.6083	3.383	3.239
4.6296	3.388	3.249
4.6512	3.396	3.258
4.6729	3.406	3.269
4.6948	3.414	3.277
4.717	3.421	3.284
4.7393	3.43	3.292
4.7619	3.438	3.302
4.7847	3.447	3.307
4.8077	3.452	3.316
4.8309	3.46	3.327
4.8544	3.469	3.335
4.878	3.477	3.342
4.902	3.482	3.351
4.9261	3.49	3.359
4.9505	3.494	3.366
4.9751	3.491	3.376
5.0	3.494	3.399
5.0251	3.507	3.421
5.0505	3.526	3.437
5.0761	3.541	3.444
5.102	3.554	3.452
5.1282	3.563	3.463
5.1546	3.576	3.474
5.1813	3.588	3.483
5.2083	3.602	3.49
5.2356	3.611	3.498
5.2632	3.618	3.507
5.291	3.628	3.519
5.3191	3.64	3.531
5.3476	3.652	3.54
5.3763	3.664	3.549
5.4054	3.675	3.558
5.4348	3.684	3.566
5.4645	3.693	3.576
5.4945	3.703	3.589
5.5249	3.714	3.6
5.5556	3.727	3.61
5.5866	3.737	3.622
5.618	3.748	3.631
5.6497	3.757	3.643
5.6818	3.769	3.654
5.7143	3.779	3.667
5.7471	3.793	3.68
5.7803	3.806	3.69
5.814	3.817	3.701
5.848	3.829	3.715
5.8824	3.843	3.728
5.9172	3.858	3.74
5.9524	3.874	3.749
5.988	3.886	3.76
6.0241	3.899	3.768
6.0606	3.909	3.78
6.0976	3.925	3.792
6.135	3.939	3.799
6.1728	3.951	3.806
6.2112	3.956	3.815
6.25	3.961	3.829
6.2893	3.969	3.85
6.3291	3.987	3.872
6.3694	4.01	3.888
6.4103	4.028	3.895
6.4516	4.043	3.904
6.4935	4.052	3.918
6.5359	4.069	3.931
6.5789	4.085	3.943
6.6225	4.103	3.955
6.6667	4.117	3.964
6.7114	4.13	3.975
6.7568	4.138	3.989
6.8027	4.155	4.006
6.8493	4.173	4.02
6.8966	4.19	4.031
6.9444	4.203	4.043
6.993	4.22	4.061
7.0423	4.239	4.07
7.0922	4.254	4.079
7.1429	4.266	4.091
7.1942	4.28	4.107
7.2464	4.296	4.119
7.2993	4.31	4.134
7.3529	4.327	4.148
7.4074	4.342	4.161
7.4627	4.357	4.175
7.5188	4.373	4.19
7.5758	4.386	4.205
7.6336	4.404	4.219
7.6923	4.419	4.235
7.7519	4.436	4.25
7.8125	4.448	4.265
7.874	4.464	4.283
7.9365	4.48	4.297
8.0	4.495	4.316
8.0645	4.506	4.332
8.1301	4.523	4.356
8.1967	4.541	4.377
8.2645	4.561	4.4
8.3333	4.586	4.419
8.4034	4.605	4.434
8.4746	4.626	4.453
8.547	4.646	4.471
8.6207	4.662	4.486
8.6957	4.678	4.505
8.7719	4.697	4.528
8.8496	4.717	4.551
8.9286	4.738	4.569
9.009	4.755	4.589
9.0909	4.775	4.617
9.1743	4.798	4.64
9.2593	4.824	4.662
9.3458	4.845	4.683
9.434	4.869	4.705
9.5238	4.889	4.727
9.6154	4.915	4.751
9.7087	4.937	4.774
9.8039	4.961	4.799
9.901	4.988	4.822
10.0	5.014	4.844
10.101	5.037	4.863
10.2041	5.058	4.885
10.3093	5.079	4.909
10.4167	5.098	4.934
10.5263	5.12	4.966
10.6383	5.15	4.995
10.7527	5.175	5.02
10.8696	5.195	5.044
10.989	5.216	5.077
11.1111	5.24	5.112
11.236	5.269	5.144
11.3636	5.294	5.173
11.4943	5.317	5.208
11.6279	5.342	5.247
11.7647	5.373	5.286
11.9048	5.401	5.323
12.0482	5.43	5.367
12.1951	5.463	5.407
12.3457	5.499	5.449
12.5	5.535	5.491
12.6582	5.571	5.527
12.8205	5.601	5.57
12.987	5.639	5.618
13.1579	5.678	5.664
13.3333	5.72	5.705
13.5135	5.755	5.751
13.6986	5.794	5.799
13.8889	5.833	5.847
14.0845	5.878	5.898
14.2857	5.908	5.948
14.4928	5.95	6.016
14.7059	6.005	6.08
14.9254	6.059	6.134
15.1515	6.102	6.187
15.3846	6.136	6.247
15.625	6.171	6.338
15.873	6.24	6.442
16.129	6.334	6.535
16.3934	6.434	6.602
16.6667	6.521	6.661
16.9492	6.607	6.723
17.2414	6.695	6.78
17.5439	6.779	6.842
17.8571	6.871	6.904
18.1818	6.962	6.96
18.5185	7.05	7.016
18.8679	7.128	7.072
19.2308	7.208	7.137
19.6078	7.29	7.223
20.0	7.367	7.299
20.4082	7.451	7.406
20.8333	7.566	7.524
21.2766	7.695	7.629
21.7391	7.83	7.72
22.2222	7.963	7.818
22.7273	8.109	7.934
23.2558	8.276	8.037
23.8095	8.45	8.135
24.3902	8.636	8.232
25.0	8.84	8.322
25.641	9.042	8.384
26.3158	9.233	8.444
27.027	9.409	8.524
27.7778	9.618	8.625
28.5714	9.835	8.71
29.4118	10.072	8.814
30.303	10.332	8.901
31.25	10.614	8.966
32.2581	10.868	9.033
33.3333	11.156	9.117
34.4828	11.487	9.217
35.7143	11.876	9.266
37.037	12.246	9.253
38.4615	12.621	9.27
40.0	13.029	9.235
41.6667	13.396	9.144
43.4783	13.742	9.11
45.4545	14.194	9.101
47.619	14.597	8.938
50.0	14.955	8.878
52.6316	15.416	8.874
55.5556	16.092	8.794

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