At one wavelength

Refractive index n: 1.72972
Extinction coefficient k: 0.11576

Permittivity ε₁: 2.97853
Permittivity ε₂: 0.400465

Absorption coefficient α: 24756.3 cm⁻¹
Penetration depth δ = λ/(2πk): 807.874 nm

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

Group index n_g: 1.906
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

# C6H4S4:C12H4N4 (Tetrathiafulvalene:tetracyanoquinodimethane, TTF:TCNQ): Querry 1985: n,k 0.21–55.6 µm
c6h4s4_c12h4n4 = ls.fetch_refractiveindex("other", "C6H4S4-C12H4N4", "Querry", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c6h4s4_c12h4n4.range_nm)  # (210, 55555.6) nm
eps = c6h4s4_c12h4n4.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_4bfc634ebb57/lightsmith"
c6h4s4_c12h4n4 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c6h4s4_c12h4n4.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (c6h4s4-c12h4n4/querry-1985).

# ... load c6h4s4_c12h4n4 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c6h4s4_c12h4n4)],
    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

Tetrathiafulvalene:Tetracyanoquinodimethane (TTF:TCNQ).

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

C6H4S4:C12H4N4 (Tetrathiafulvalene:tetracyanoquinodimethane, TTF:TCNQ), Querry 1985: n,k 0.21–55.6 µm: n and k versus wavelength
λ (µm)	n	k
0.21	1.713	0.235
0.22	1.735	0.154
0.23	1.74	0.103
0.24	1.72	0.056
0.25	1.684	0.034
0.26	1.651	0.03
0.27	1.623	0.033
0.28	1.594	0.042
0.29	1.567	0.057
0.3	1.539	0.076
0.31	1.507	0.109
0.32	1.48	0.163
0.33	1.478	0.241
0.34	1.52	0.315
0.35	1.587	0.356
0.36	1.654	0.369
0.37	1.714	0.362
0.38	1.765	0.338
0.39	1.797	0.304
0.4	1.814	0.273
0.41	1.824	0.249
0.42	1.834	0.228
0.43	1.843	0.204
0.44	1.848	0.178
0.45	1.845	0.149
0.46	1.83	0.123
0.47	1.809	0.108
0.48	1.791	0.104
0.49	1.777	0.104
0.5	1.767	0.105
0.51	1.759	0.106
0.52	1.752	0.109
0.53	1.747	0.113
0.54	1.745	0.115
0.55	1.744	0.115
0.56	1.74	0.114
0.57	1.736	0.114
0.58	1.732	0.115
0.59	1.729	0.116
0.6	1.727	0.117
0.61	1.724	0.117
0.62	1.721	0.116
0.63	1.717	0.115
0.64	1.714	0.114
0.65	1.707	0.112
0.66	1.698	0.114
0.67	1.691	0.118
0.68	1.686	0.122
0.69	1.68	0.127
0.7	1.675	0.131
0.71	1.671	0.137
0.72	1.667	0.142
0.73	1.663	0.149
0.74	1.66	0.155
0.75	1.658	0.162
0.76	1.658	0.169
0.77	1.657	0.175
0.78	1.657	0.18
0.79	1.657	0.184
0.8	1.655	0.188
0.81	1.653	0.195
0.82	1.652	0.203
0.83	1.653	0.212
0.84	1.657	0.221
0.85	1.663	0.227
0.86	1.669	0.231
0.87	1.676	0.233
0.88	1.68	0.232
0.89	1.683	0.232
0.9	1.685	0.231
0.91	1.684	0.231
0.92	1.684	0.234
0.93	1.684	0.237
0.94	1.686	0.242
0.95	1.69	0.247
0.96	1.696	0.251
0.97	1.705	0.253
0.98	1.715	0.253
0.99	1.725	0.248
1.0	1.735	0.24
1.01	1.741	0.227
1.02	1.743	0.213
1.03	1.74	0.198
1.04	1.733	0.185
1.05	1.724	0.175
1.06	1.713	0.168
1.07	1.701	0.163
1.08	1.691	0.16
1.09	1.68	0.158
1.1	1.669	0.158
1.11	1.659	0.158
1.12	1.649	0.16
1.13	1.641	0.162
1.14	1.633	0.164
1.15	1.625	0.165
1.16	1.616	0.167
1.17	1.608	0.169
1.18	1.599	0.172
1.19	1.59	0.176
1.2	1.583	0.181
1.21	1.576	0.183
1.22	1.568	0.187
1.23	1.56	0.191
1.24	1.552	0.194
1.25	1.544	0.199
1.26	1.536	0.203
1.27	1.529	0.207
1.28	1.521	0.212
1.29	1.512	0.217
1.3	1.504	0.222
1.31	1.495	0.228
1.32	1.488	0.234
1.33	1.479	0.24
1.34	1.471	0.247
1.35	1.463	0.253
1.36	1.454	0.26
1.37	1.446	0.268
1.38	1.437	0.276
1.39	1.429	0.284
1.4	1.421	0.292
1.41	1.412	0.301
1.42	1.404	0.31
1.43	1.396	0.32
1.44	1.388	0.33
1.45	1.379	0.341
1.46	1.372	0.352
1.47	1.365	0.364
1.48	1.357	0.375
1.49	1.35	0.388
1.5	1.343	0.401
1.51	1.337	0.414
1.52	1.331	0.427
1.53	1.325	0.44
1.54	1.318	0.455
1.55	1.313	0.471
1.56	1.31	0.486
1.57	1.306	0.501
1.58	1.303	0.516
1.59	1.299	0.532
1.6	1.297	0.549
1.61	1.296	0.565
1.62	1.295	0.581
1.63	1.294	0.597
1.64	1.294	0.613
1.65	1.295	0.629
1.66	1.296	0.645
1.67	1.297	0.661
1.68	1.299	0.677
1.69	1.302	0.692
1.7	1.305	0.708
1.71	1.308	0.723
1.72	1.312	0.738
1.73	1.316	0.753
1.74	1.32	0.768
1.75	1.325	0.782
1.76	1.33	0.796
1.77	1.335	0.81
1.78	1.341	0.824
1.79	1.348	0.838
1.8	1.354	0.85
1.81	1.36	0.862
1.82	1.366	0.875
1.83	1.372	0.888
1.84	1.379	0.901
1.85	1.388	0.912
1.86	1.394	0.923
1.87	1.4	0.934
1.88	1.407	0.946
1.89	1.415	0.957
1.9	1.422	0.968
1.91	1.43	0.979
1.92	1.438	0.99
1.93	1.446	1.0
1.94	1.454	1.01
1.95	1.462	1.02
1.96	1.47	1.029
1.97	1.478	1.039
1.98	1.486	1.048
1.99	1.495	1.057
2.0	1.503	1.067
2.01	1.512	1.076
2.02	1.52	1.085
2.03	1.529	1.093
2.04	1.538	1.101
2.05	1.547	1.109
2.06	1.556	1.117
2.07	1.565	1.125
2.08	1.574	1.132
2.09	1.583	1.139
2.1	1.591	1.146
2.11	1.6	1.153
2.12	1.609	1.16
2.13	1.618	1.166
2.14	1.627	1.173
2.15	1.636	1.18
2.16	1.645	1.186
2.17	1.654	1.192
2.18	1.662	1.198
2.19	1.671	1.203
2.2	1.68	1.209
2.21	1.689	1.215
2.22	1.698	1.221
2.23	1.706	1.226
2.24	1.715	1.231
2.25	1.724	1.237
2.26	1.733	1.243
2.27	1.742	1.248
2.28	1.751	1.253
2.29	1.76	1.257
2.3	1.769	1.262
2.31	1.778	1.267
2.32	1.787	1.271
2.33	1.796	1.275
2.34	1.805	1.279
2.35	1.814	1.284
2.36	1.823	1.288
2.37	1.832	1.291
2.38	1.841	1.295
2.39	1.849	1.298
2.4	1.858	1.302
2.41	1.867	1.306
2.42	1.876	1.309
2.43	1.885	1.312
2.44	1.893	1.315
2.45	1.901	1.318
2.46	1.91	1.322
2.4712	1.919	1.325
2.48	1.928	1.328
2.49	1.937	1.331
2.5	1.946	1.334
2.5063	1.952	1.335
2.5126	1.957	1.336
2.5189	1.963	1.338
2.5253	1.969	1.339
2.5316	1.974	1.34
2.5381	1.979	1.341
2.5445	1.985	1.344
2.551	1.991	1.345
2.5575	1.997	1.345
2.5641	2.002	1.346
2.5707	2.006	1.348
2.5773	2.012	1.35
2.584	2.018	1.351
2.5907	2.024	1.352
2.5974	2.029	1.353
2.6042	2.035	1.355
2.611	2.041	1.356
2.6178	2.047	1.356
2.6247	2.053	1.357
2.6316	2.059	1.358
2.6385	2.065	1.358
2.6455	2.07	1.359
2.6525	2.076	1.36
2.6596	2.081	1.361
2.6667	2.087	1.361
2.6738	2.092	1.362
2.681	2.097	1.364
2.6882	2.103	1.365
2.6954	2.11	1.366
2.7027	2.116	1.367
2.71	2.122	1.366
2.7174	2.127	1.366
2.7248	2.132	1.368
2.7322	2.138	1.371
2.7397	2.146	1.372
2.7473	2.153	1.372
2.7548	2.159	1.372
2.7624	2.166	1.371
2.7701	2.172	1.371
2.7778	2.178	1.37
2.7855	2.184	1.369
2.7933	2.189	1.368
2.8011	2.193	1.368
2.809	2.198	1.37
2.8169	2.204	1.371
2.8249	2.211	1.372
2.8329	2.217	1.372
2.8409	2.223	1.372
2.849	2.229	1.372
2.8571	2.235	1.371
2.8653	2.241	1.372
2.8736	2.247	1.372
2.8818	2.254	1.372
2.8902	2.26	1.372
2.8986	2.266	1.372
2.907	2.272	1.372
2.9155	2.279	1.371
2.924	2.285	1.37
2.9326	2.29	1.369
2.9412	2.295	1.369
2.9499	2.302	1.37
2.9586	2.309	1.37
2.9674	2.316	1.37
2.9762	2.322	1.369
2.9851	2.329	1.368
2.994	2.336	1.367
3.003	2.342	1.366
3.012	2.349	1.365
3.0211	2.355	1.364
3.0303	2.361	1.362
3.0395	2.367	1.362
3.0488	2.374	1.361
3.0581	2.381	1.359
3.0675	2.386	1.358
3.0769	2.393	1.357
3.0864	2.4	1.356
3.096	2.407	1.353
3.1056	2.413	1.35
3.1153	2.418	1.348
3.125	2.424	1.346
3.1348	2.429	1.345
3.1447	2.436	1.342
3.1546	2.438	1.338
3.1646	2.446	1.341
3.1746	2.452	1.335
3.1847	2.456	1.334
3.1949	2.461	1.331
3.2051	2.464	1.328
3.2154	2.467	1.326
3.2258	2.466	1.322
3.2362	2.47	1.317
3.2468	2.409	1.309
3.2573	2.494	1.46
3.268	2.543	1.358
3.2787	2.543	1.339
3.2895	2.54	1.331
3.3003	2.548	1.326
3.3113	2.552	1.317
3.3223	2.555	1.313
3.3333	2.559	1.312
3.3445	2.568	1.304
3.3557	2.569	1.299
3.367	2.574	1.3
3.3784	2.581	1.293
3.3898	2.587	1.289
3.4014	2.591	1.283
3.413	2.594	1.279
3.4247	2.597	1.277
3.4364	2.605	1.27
3.4483	2.603	1.268
3.4602	2.61	1.263
3.4722	2.612	1.261
3.4843	2.613	1.254
3.4965	2.616	1.255
3.5088	2.621	1.253
3.5211	2.623	1.251
3.5336	2.627	1.252
3.5461	2.631	1.248
3.5587	2.638	1.25
3.5714	2.644	1.249
3.5842	2.648	1.247
3.5971	2.657	1.244
3.6101	2.659	1.238
3.6232	2.661	1.237
3.6364	2.67	1.235
3.6496	2.677	1.236
3.663	2.68	1.227
3.6765	2.681	1.228
3.69	2.69	1.227
3.7037	2.698	1.222
3.7175	2.703	1.215
3.7313	2.704	1.217
3.7453	2.712	1.218
3.7594	2.719	1.21
3.7736	2.723	1.203
3.7879	2.729	1.206
3.8023	2.737	1.197
3.8168	2.738	1.194
3.8314	2.743	1.188
3.8462	2.75	1.188
3.861	2.756	1.186
3.876	2.758	1.178
3.8911	2.769	1.178
3.9063	2.768	1.169
3.9216	2.775	1.168
3.937	2.781	1.158
3.9526	2.783	1.154
3.9683	2.786	1.153
3.9841	2.796	1.148
4.0	2.793	1.144
4.0161	2.804	1.14
4.0323	2.806	1.131
4.0486	2.811	1.125
4.065	2.815	1.123
4.0816	2.814	1.117
4.0984	2.824	1.111
4.1152	2.828	1.107
4.1322	2.828	1.099
4.1494	2.836	1.098
4.1667	2.838	1.086
4.1841	2.84	1.081
4.2017	2.84	1.071
4.2194	2.842	1.063
4.2373	2.837	1.057
4.2553	2.838	1.055
4.2735	2.838	1.051
4.2918	2.838	1.046
4.3103	2.829	1.041
4.329	2.833	1.047
4.3478	2.834	1.046
4.3668	2.839	1.044
4.386	2.843	1.04
4.4053	2.847	1.033
4.4248	2.843	1.023
4.4444	2.84	1.019
4.4643	2.837	1.014
4.4843	2.829	1.006
4.5045	2.801	0.997
4.5249	2.696	1.065
4.5455	2.924	1.15
4.5662	2.87	1.047
4.5872	2.895	1.066
4.6083	2.875	1.048
4.6296	2.913	1.046
4.6512	2.905	1.024
4.6729	2.902	1.015
4.6948	2.902	1.011
4.717	2.902	1.009
4.7393	2.902	1.007
4.7619	2.902	1.006
4.7847	2.91	1.006
4.8077	2.912	1.008
4.8309	2.926	1.013
4.8544	2.942	1.003
4.878	2.951	0.986
4.902	2.957	0.974
4.9261	2.948	0.962
4.9505	2.956	0.954
4.9751	2.949	0.947
5.0	2.95	0.939
5.0251	2.951	0.935
5.0505	2.952	0.928
5.0761	2.948	0.922
5.102	2.949	0.917
5.1282	2.945	0.914
5.1546	2.947	0.909
5.1813	2.94	0.907
5.2083	2.953	0.906
5.2356	2.95	0.896
5.2632	2.947	0.891
5.291	2.948	0.89
5.3191	2.947	0.885
5.3476	2.946	0.881
5.3763	2.949	0.881
5.4054	2.947	0.875
5.4348	2.949	0.873
5.4645	2.951	0.867
5.4945	2.95	0.861
5.5249	2.95	0.857
5.5556	2.949	0.853
5.5866	2.946	0.849
5.618	2.948	0.847
5.6497	2.947	0.84
5.6818	2.946	0.834
5.7143	2.943	0.829
5.7471	2.939	0.821
5.7803	2.931	0.822
5.814	2.931	0.818
5.848	2.919	0.817
5.8824	2.92	0.819
5.9172	2.915	0.822
5.9524	2.915	0.82
5.988	2.916	0.819
6.0241	2.91	0.819
6.0606	2.91	0.813
6.0976	2.904	0.815
6.135	2.898	0.815
6.1728	2.903	0.82
6.2112	2.894	0.808
6.25	2.88	0.819
6.2893	2.879	0.826
6.3291	2.878	0.838
6.3694	2.891	0.843
6.4103	2.896	0.832
6.4516	2.883	0.824
6.4935	2.871	0.823
6.5359	2.85	0.832
6.5789	2.838	0.873
6.6225	2.851	0.891
6.6667	2.903	0.893
6.7114	2.889	0.874
6.7568	2.88	0.883
6.8027	2.886	0.893
6.8493	2.891	0.903
6.8966	2.906	0.908
6.9444	2.912	0.902
6.993	2.916	0.894
7.0423	2.91	0.894
7.0922	2.903	0.899
7.1429	2.905	0.908
7.1942	2.9	0.908
7.2464	2.897	0.937
7.2993	2.912	0.932
7.3529	2.91	0.941
7.4074	2.899	0.946
7.4627	2.917	1.051
7.5188	2.977	0.974
7.5758	2.966	0.976
7.6336	2.973	0.982
7.6923	2.974	0.993
7.7519	2.99	1.001
7.8125	3.002	1.002
7.874	3.011	1.008
7.9365	2.991	1.005
8.0	3.082	1.186
8.0645	3.155	1.008
8.1301	3.143	0.993
8.1967	3.145	0.975
8.2645	3.171	0.981
8.3333	3.166	0.936
8.4034	3.171	0.925
8.4746	3.161	0.908
8.547	3.157	0.899
8.6207	3.153	0.896
8.6957	3.147	0.889
8.7719	3.138	0.894
8.8496	3.147	0.893
8.9286	3.14	0.902
9.009	3.148	0.894
9.0909	3.137	0.895
9.1743	3.17	0.945
9.2593	3.172	0.909
9.3458	3.183	0.9
9.434	3.183	0.911
9.5238	3.197	0.916
9.6154	3.218	0.916
9.7087	3.236	0.907
9.8039	3.245	0.894
9.901	3.259	0.882
10.0	3.265	0.868
10.101	3.272	0.853
10.2041	3.272	0.839
10.3093	3.27	0.825
10.4167	3.264	0.816
10.5263	3.263	0.811
10.6383	3.261	0.802
10.7527	3.258	0.796
10.8696	3.256	0.79
10.989	3.248	0.782
11.1111	3.243	0.782
11.236	3.234	0.789
11.3636	3.245	0.78
11.4943	3.232	0.775
11.6279	3.227	0.778
11.7647	3.211	0.78
11.9048	3.195	0.793
12.0482	3.176	0.802
12.1951	3.201	0.978
12.3457	3.35	0.84
12.5	3.313	0.789
12.6582	3.283	0.782
12.8205	3.272	0.786
12.987	3.269	0.785
13.1579	3.264	0.786
13.3333	3.256	0.793
13.5135	3.251	0.798
13.6986	3.25	0.809
13.8889	3.239	0.816
14.0845	3.241	0.874
14.2857	3.297	0.862
14.4928	3.317	0.864
14.7059	3.328	0.829
14.9254	3.317	0.824
15.1515	3.312	0.83
15.3846	3.315	0.833
15.625	3.314	0.842
15.873	3.316	0.867
16.129	3.357	0.857
16.3934	3.351	0.847
16.6667	3.35	0.864
16.9492	3.379	0.866
17.2414	3.393	0.858
17.5439	3.407	0.841
17.8571	3.396	0.826
18.1818	3.393	0.824
18.5185	3.383	0.829
18.8679	3.382	0.835
19.2308	3.381	0.839
19.6078	3.385	0.86
20.0	3.388	0.848
20.4082	3.38	0.866
20.8333	3.377	0.877
21.2766	3.411	0.909
21.7391	3.392	0.897
22.2222	3.415	0.936
22.7273	3.424	0.927
23.2558	3.423	0.944
23.8095	3.431	0.966
24.3902	3.442	0.986
25.0	3.463	1.011
25.641	3.481	1.029
26.3158	3.507	1.047
27.027	3.532	1.061
27.7778	3.553	1.076
28.5714	3.576	1.092
29.4118	3.606	1.113
30.303	3.635	1.125
31.25	3.664	1.142
32.2581	3.698	1.159
33.3333	3.734	1.168
34.4828	3.762	1.18
35.7143	3.792	1.199
37.037	3.826	1.219
38.4615	3.862	1.248
40.0	3.894	1.304
41.6667	3.992	1.368
43.4783	4.154	1.355
45.4545	4.202	1.321
47.619	4.302	1.328
50.0	4.367	1.288
52.6316	4.503	1.28
55.5556	4.621	1.18

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