Optical constants

Refractive index of CS₂ (Carbon disulfide)

Chang et al. 2024: n 0.4–2.0 µm

Data: formula 1
Range: 0.4–2 µm
Temperature: 295 K
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.62361
Extinction coefficient k: 0

Permittivity ε₁: 2.63611
Permittivity ε₂: 0

Absorption coefficient α: 0 cm⁻¹
Penetration depth δ = λ/(2πk): — nm

Abbe number V_d: 20.218
Chromatic dispersion dn/dλ: -0.156189 µm⁻¹

Group index n_g: 1.71539
Group velocity dispersion: 311.754 fs²/mm

Dispersion parameter D: -1700.79 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

# CS2 (Carbon disulfide): Chang et al. 2024: n 0.4–2.0 µm
cs2 = ls.fetch_refractiveindex("main", "CS2", "Chang", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cs2.range_nm)  # (400, 2000) nm
eps = cs2.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_551f70ff6c69/lightsmith"
cs2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(cs2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (cs2/chang-2024).

# ... load cs2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=cs2)],
    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"]).

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_551f70ff6c69/lightsmith?model=drude_lorentz"
cs2_dl = ls.DrudeLorentz.model_validate(json.load(urllib.request.urlopen(url)))

A dispersive Drude–Lorentz model for time-domain solvers.

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.

Dispersion formula

Sellmeier (formula 1), λ in µm

n^{2} - 1 = \frac{1.502 λ^{2}}{λ^{2} - {0.169}^{2}} + \frac{0.163 λ^{2}}{λ^{2} - {6.52}^{2}}

Valid from 0.4 to 2.0 µm.

Coefficients as stored

C_i	Value
C1	0.0
C2	1.502
C3	0.169
C4	0.163
C5	6.52

Comments and conditions

21.5–22.0 °C.

Conditions

temperature: 295 K

References

H.-J. Chang, N. Munera, C. Lopez-Zelaya, D. Banerjee, G. Beadie, E. W. Van Stryland, D. J. Hagan. Refractive index measurements of liquids from 0.5 to 2 µm using Rayleigh interferometry. Opt. Mater. Express 14, 1253–1267 (2024)

doi:10.1364/ome.519907 Refractive index measurements of liquids from 0.5 to 2 µm using Rayleigh interferometry, Optical Materials Express (2024)

Cite

Hao-Jung Chang et al.. Refractive index measurements of liquids from 0.5 to 2 µm using Rayleigh interferometry. Optical Materials Express, 14, 1253 (2024), doi:10.1364/ome.519907; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

Computed on 400 wavelengths, the same grid as the API and the library

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

CS2 (Carbon disulfide), Chang et al. 2024: n 0.4–2.0 µm: n and k versus wavelength
λ (µm)	n
0.4	1.681595
0.401617	1.680645
0.40324	1.679707
0.40487	1.678778
0.406506	1.677859
0.408149	1.67695
0.409799	1.676051
0.411455	1.675162
0.413118	1.674282
0.414788	1.673412
0.416465	1.672551
0.418148	1.671699
0.419838	1.670856
0.421535	1.670022
0.423239	1.669197
0.424949	1.668381
0.426667	1.667573
0.428391	1.666773
0.430123	1.665982
0.431861	1.6652
0.433607	1.664425
0.435359	1.663658
0.437119	1.6629
0.438886	1.662149
0.44066	1.661406
0.442441	1.660671
0.444229	1.659943
0.446024	1.659223
0.447827	1.65851
0.449637	1.657804
0.451455	1.657106
0.453279	1.656414
0.455111	1.65573
0.456951	1.655053
0.458798	1.654382
0.460652	1.653718
0.462514	1.653061
0.464383	1.652411
0.46626	1.651767
0.468145	1.651129
0.470037	1.650498
0.471937	1.649873
0.473844	1.649255
0.47576	1.648642
0.477683	1.648036
0.479613	1.647435
0.481552	1.646841
0.483498	1.646252
0.485452	1.645669
0.487414	1.645092
0.489385	1.644521
0.491363	1.643955
0.493349	1.643395
0.495343	1.64284
0.497345	1.64229
0.499355	1.641746
0.501373	1.641207
0.5034	1.640674
0.505434	1.640145
0.507477	1.639622
0.509528	1.639103
0.511588	1.63859
0.513655	1.638082
0.515732	1.637578
0.517816	1.637079
0.519909	1.636585
0.52201	1.636096
0.52412	1.635611
0.526239	1.635131
0.528366	1.634656
0.530501	1.634185
0.532645	1.633718
0.534798	1.633256
0.53696	1.632799
0.53913	1.632345
0.541309	1.631896
0.543497	1.631451
0.545694	1.63101
0.547899	1.630573
0.550114	1.630141
0.552337	1.629712
0.55457	1.629288
0.556811	1.628867
0.559062	1.62845
0.561321	1.628037
0.56359	1.627628
0.565868	1.627223
0.568155	1.626821
0.570452	1.626424
0.572757	1.626029
0.575072	1.625639
0.577397	1.625252
0.57973	1.624868
0.582073	1.624488
0.584426	1.624112
0.586788	1.623739
0.58916	1.623369
0.591541	1.623003
0.593932	1.62264
0.596333	1.62228
0.598743	1.621924
0.601163	1.62157
0.603593	1.62122
0.606032	1.620873
0.608482	1.62053
0.610941	1.620189
0.613411	1.619851
0.61589	1.619517
0.618379	1.619185
0.620879	1.618857
0.623388	1.618531
0.625908	1.618208
0.628438	1.617888
0.630978	1.617571
0.633528	1.617257
0.636088	1.616945
0.638659	1.616636
0.641241	1.61633
0.643833	1.616027
0.646435	1.615726
0.649048	1.615428
0.651671	1.615133
0.654305	1.61484
0.656949	1.61455
0.659605	1.614262
0.662271	1.613977
0.664948	1.613694
0.667635	1.613414
0.670334	1.613136
0.673043	1.61286
0.675763	1.612587
0.678495	1.612317
0.681237	1.612048
0.68399	1.611782
0.686755	1.611519
0.689531	1.611257
0.692318	1.610998
0.695116	1.610741
0.697925	1.610486
0.700746	1.610234
0.703579	1.609983
0.706422	1.609735
0.709278	1.609489
0.712144	1.609244
0.715023	1.609002
0.717913	1.608762
0.720814	1.608524
0.723728	1.608288
0.726653	1.608055
0.72959	1.607823
0.732539	1.607592
0.7355	1.607364
0.738472	1.607138
0.741457	1.606914
0.744454	1.606691
0.747463	1.606471
0.750484	1.606252
0.753517	1.606035
0.756563	1.60582
0.759621	1.605607
0.762691	1.605395
0.765774	1.605185
0.768869	1.604977
0.771977	1.604771
0.775097	1.604566
0.77823	1.604363
0.781375	1.604162
0.784533	1.603962
0.787704	1.603764
0.790888	1.603568
0.794085	1.603373
0.797294	1.60318
0.800517	1.602988
0.803752	1.602798
0.807001	1.602609
0.810263	1.602422
0.813538	1.602237
0.816826	1.602053
0.820127	1.60187
0.823442	1.601689
0.82677	1.601509
0.830112	1.601331
0.833467	1.601154
0.836836	1.600979
0.840218	1.600805
0.843614	1.600632
0.847024	1.600461
0.850447	1.600291
0.853885	1.600122
0.857336	1.599955
0.860801	1.599789
0.86428	1.599624
0.867774	1.599461
0.871281	1.599299
0.874803	1.599138
0.878338	1.598978
0.881888	1.59882
0.885453	1.598662
0.889032	1.598506
0.892625	1.598352
0.896233	1.598198
0.899855	1.598046
0.903492	1.597894
0.907144	1.597744
0.910811	1.597595
0.914492	1.597448
0.918188	1.597301
0.921899	1.597155
0.925626	1.597011
0.929367	1.596867
0.933123	1.596725
0.936895	1.596584
0.940681	1.596443
0.944483	1.596304
0.948301	1.596166
0.952134	1.596029
0.955982	1.595893
0.959846	1.595757
0.963726	1.595623
0.967621	1.59549
0.971532	1.595358
0.975458	1.595226
0.979401	1.595096
0.98336	1.594967
0.987334	1.594838
0.991325	1.594711
0.995332	1.594584
0.999355	1.594458
1.00339	1.594333
1.00745	1.594209
1.01152	1.594086
1.01561	1.593964
1.01971	1.593843
1.02384	1.593722
1.02797	1.593602
1.03213	1.593483
1.0363	1.593365
1.04049	1.593248
1.04469	1.593131
1.04892	1.593016
1.05316	1.592901
1.05741	1.592787
1.06169	1.592673
1.06598	1.592561
1.07029	1.592449
1.07461	1.592338
1.07896	1.592227
1.08332	1.592117
1.0877	1.592008
1.09209	1.5919
1.09651	1.591793
1.10094	1.591686
1.10539	1.591579
1.10986	1.591474
1.11434	1.591369
1.11885	1.591265
1.12337	1.591161
1.12791	1.591058
1.13247	1.590956
1.13704	1.590854
1.14164	1.590753
1.14625	1.590653
1.15089	1.590553
1.15554	1.590454
1.16021	1.590355
1.1649	1.590257
1.16961	1.59016
1.17433	1.590063
1.17908	1.589967
1.18385	1.589871
1.18863	1.589776
1.19344	1.589681
1.19826	1.589587
1.2031	1.589493
1.20797	1.5894
1.21285	1.589307
1.21775	1.589215
1.22267	1.589124
1.22761	1.589033
1.23258	1.588942
1.23756	1.588852
1.24256	1.588762
1.24758	1.588673
1.25262	1.588584
1.25769	1.588496
1.26277	1.588408
1.26787	1.588321
1.273	1.588234
1.27814	1.588147
1.28331	1.588061
1.2885	1.587976
1.2937	1.58789
1.29893	1.587806
1.30418	1.587721
1.30945	1.587637
1.31475	1.587553
1.32006	1.58747
1.3254	1.587387
1.33075	1.587305
1.33613	1.587222
1.34153	1.587141
1.34696	1.587059
1.3524	1.586978
1.35787	1.586897
1.36335	1.586817
1.36886	1.586736
1.3744	1.586657
1.37995	1.586577
1.38553	1.586498
1.39113	1.586419
1.39675	1.58634
1.4024	1.586262
1.40807	1.586184
1.41376	1.586106
1.41947	1.586029
1.42521	1.585951
1.43097	1.585874
1.43675	1.585798
1.44256	1.585721
1.44839	1.585645
1.45424	1.585569
1.46012	1.585493
1.46602	1.585418
1.47195	1.585342
1.4779	1.585267
1.48387	1.585192
1.48987	1.585118
1.49589	1.585043
1.50194	1.584969
1.50801	1.584895
1.5141	1.584821
1.52022	1.584747
1.52637	1.584674
1.53254	1.5846
1.53873	1.584527
1.54495	1.584454
1.55119	1.584381
1.55746	1.584308
1.56376	1.584235
1.57008	1.584163
1.57643	1.58409
1.5828	1.584018
1.58919	1.583946
1.59562	1.583874
1.60207	1.583802
1.60854	1.58373
1.61504	1.583658
1.62157	1.583587
1.62813	1.583515
1.63471	1.583443
1.64131	1.583372
1.64795	1.583301
1.65461	1.583229
1.6613	1.583158
1.66801	1.583087
1.67475	1.583015
1.68152	1.582944
1.68832	1.582873
1.69514	1.582802
1.70199	1.582731
1.70887	1.58266
1.71578	1.582589
1.72271	1.582518
1.72968	1.582447
1.73667	1.582375
1.74369	1.582304
1.75074	1.582233
1.75781	1.582162
1.76492	1.582091
1.77205	1.58202
1.77921	1.581948
1.7864	1.581877
1.79362	1.581806
1.80087	1.581734
1.80815	1.581663
1.81546	1.581591
1.8228	1.581519
1.83017	1.581447
1.83756	1.581376
1.84499	1.581304
1.85245	1.581231
1.85993	1.581159
1.86745	1.581087
1.875	1.581014
1.88258	1.580942
1.89019	1.580869
1.89783	1.580796
1.9055	1.580723
1.9132	1.58065
1.92093	1.580577
1.9287	1.580503
1.93649	1.58043
1.94432	1.580356
1.95218	1.580282
1.96007	1.580207
1.96799	1.580133
1.97594	1.580058
1.98393	1.579983
1.99195	1.579908
2	1.579833

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: —

CS₂ (Carbon disulfide): all datasets

About CS2 (Carbon disulfide)

Carbon disulfide (CS₂) is a volatile, colorless liquid with a pungent, ether-like odor. It is a simple molecular compound composed of one carbon atom bonded to two sulfur atoms, and it serves as an important industrial solvent. Historically, it has been used in the production of viscose rayon and cellophane film, although its use has declined due to health and environmental concerns. In organic chemistry, CS₂ is a valuable reagent for synthesizing carbon-sulfur and sulfur-sulfur bonds. It is also used as a fumigant for stored grain, but its flammability and toxicity have led to the search for safer alternatives. Due to its volatile nature, CS₂ can easily form explosive mixtures with air and poses significant health risks upon exposure, including neurological damage. Therefore, handling and storage of CS₂ necessitate stringent safety measures. Overall, while carbon disulfide has significant industrial utility, its hazardous nature requires careful management.

More about CS2 (Carbon disulfide) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/main/CS2/nk/Chang.yml
ID: ds_551f70ff6c69
API: /v1/datasets/ds_551f70ff6c69

Plot