Optical constants

Refractive index of C₂H₆OS (Dimethyl sulfoxide, DMSO)

Li et al. 2022: n 0.2–1.7 µm

Data: formula 5
Range: 0.2–1.7 µm
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.47985
Extinction coefficient k: 0

Permittivity ε₁: 2.18996
Permittivity ε₂: 0

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

Abbe number V_d: 33.294
Chromatic dispersion dn/dλ: -0.0742909 µm⁻¹

Group index n_g: 1.5235
Group velocity dispersion: 135.259 fs²/mm

Dispersion parameter D: -737.91 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

# C2H6OS (Dimethyl sulfoxide, DMSO): Li et al. 2022: n 0.2–1.7 µm
c2h6os = ls.fetch_refractiveindex("organic", "dimethyl_sulfoxide", "Li", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c2h6os.range_nm)  # (200, 1700) nm
eps = c2h6os.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_a3c233f64e63/lightsmith"
c2h6os = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c2h6os.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (dimethyl-sulfoxide/li-2022).

# ... load c2h6os as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c2h6os)],
    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.

Dispersion formula

Cauchy (formula 5), λ in µm

n = 1.4575 + 0.008036 λ^{- 2.0} - 0.0001581 λ^{- 4.0} + 1.653 \times 10^{-5} λ^{- 6.0}

Valid from 0.2 to 1.7 µm.

Coefficients as stored

C_i	Value
C1	1.4575
C2	0.008036
C3	-2.0
C4	-0.0001581
C5	-4.0
C6	1.653e-05
C7	-6.0

Comments and conditions

Room temperature.

References

X. Li, C. Wang, L. Ma, L. Liu. Ellipsometry-transmission measurement of the complex refractive indices for a series of organic solvents in the 200–1700 nm spectral range. Infrared Phys. Technol. 125, 104313 (2022)

doi:10.1016/j.infrared.2022.104313 Ellipsometry-transmission measurement of the complex refractive indices for a series of organic solvents in the 200–1700 nm spectral range, Infrared Physics & Technology (2022)

Cite

Xiaoning Li, Chengchao Wang, Lanxin Ma and Linhua Liu. Ellipsometry-transmission measurement of the complex refractive indices for a series of organic solvents in the 200–1700 nm spectral range. Infrared Physics & Technology, 125, 104313 (2022), doi:10.1016/j.infrared.2022.104313; 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

C2H6OS (Dimethyl sulfoxide, DMSO), Li et al. 2022: n 0.2–1.7 µm: n and k versus wavelength
λ (µm)	n
0.2	1.817869
0.201076	1.809643
0.202157	1.801655
0.203244	1.793896
0.204337	1.78636
0.205436	1.77904
0.206541	1.771929
0.207652	1.76502
0.208768	1.758306
0.209891	1.751783
0.21102	1.745443
0.212155	1.739281
0.213296	1.733291
0.214443	1.727469
0.215596	1.721808
0.216756	1.716304
0.217921	1.710951
0.219093	1.705746
0.220272	1.700683
0.221456	1.695758
0.222647	1.690967
0.223845	1.686306
0.225049	1.68177
0.226259	1.677356
0.227476	1.67306
0.228699	1.668878
0.229929	1.664806
0.231165	1.660842
0.232409	1.656982
0.233659	1.653223
0.234915	1.649562
0.236179	1.645995
0.237449	1.64252
0.238726	1.639134
0.24001	1.635835
0.2413	1.632619
0.242598	1.629484
0.243903	1.626428
0.245214	1.623449
0.246533	1.620543
0.247859	1.617709
0.249192	1.614945
0.250532	1.612248
0.25188	1.609617
0.253234	1.607049
0.254596	1.604543
0.255965	1.602097
0.257342	1.599708
0.258726	1.597376
0.260117	1.595099
0.261516	1.592875
0.262923	1.590702
0.264337	1.588579
0.265758	1.586505
0.267187	1.584478
0.268624	1.582496
0.270069	1.580559
0.271521	1.578665
0.272982	1.576813
0.27445	1.575002
0.275926	1.57323
0.27741	1.571497
0.278902	1.569801
0.280402	1.568141
0.28191	1.566516
0.283426	1.564926
0.28495	1.563368
0.286482	1.561843
0.288023	1.56035
0.289572	1.558887
0.291129	1.557454
0.292695	1.55605
0.294269	1.554673
0.295852	1.553325
0.297443	1.552002
0.299042	1.550706
0.300651	1.549435
0.302268	1.548188
0.303893	1.546965
0.305527	1.545766
0.307171	1.544589
0.308823	1.543434
0.310483	1.5423
0.312153	1.541187
0.313832	1.540095
0.31552	1.539022
0.317217	1.537969
0.318923	1.536935
0.320638	1.535919
0.322362	1.53492
0.324096	1.53394
0.325839	1.532976
0.327591	1.532028
0.329353	1.531097
0.331124	1.530182
0.332905	1.529282
0.334695	1.528397
0.336495	1.527526
0.338305	1.52667
0.340124	1.525828
0.341954	1.525
0.343793	1.524184
0.345641	1.523382
0.3475	1.522592
0.349369	1.521815
0.351248	1.52105
0.353137	1.520297
0.355036	1.519555
0.356946	1.518825
0.358865	1.518105
0.360795	1.517397
0.362736	1.516699
0.364686	1.516011
0.366648	1.515334
0.368619	1.514666
0.370602	1.514008
0.372595	1.51336
0.374599	1.512721
0.376613	1.512091
0.378639	1.511469
0.380675	1.510857
0.382722	1.510253
0.384781	1.509658
0.38685	1.50907
0.38893	1.508491
0.391022	1.50792
0.393125	1.507356
0.395239	1.5068
0.397365	1.506251
0.399502	1.50571
0.40165	1.505175
0.40381	1.504648
0.405982	1.504128
0.408166	1.503614
0.410361	1.503107
0.412568	1.502607
0.414786	1.502113
0.417017	1.501625
0.41926	1.501143
0.421515	1.500668
0.423781	1.500198
0.42606	1.499734
0.428352	1.499276
0.430656	1.498824
0.432972	1.498377
0.4353	1.497936
0.437641	1.4975
0.439995	1.497069
0.442361	1.496644
0.44474	1.496223
0.447132	1.495808
0.449537	1.495397
0.451954	1.494992
0.454385	1.494591
0.456828	1.494195
0.459285	1.493804
0.461755	1.493417
0.464239	1.493034
0.466735	1.492657
0.469245	1.492283
0.471769	1.491914
0.474306	1.491549
0.476857	1.491188
0.479421	1.490831
0.482	1.490479
0.484592	1.49013
0.487198	1.489785
0.489818	1.489445
0.492452	1.489108
0.495101	1.488774
0.497763	1.488445
0.50044	1.488119
0.503132	1.487797
0.505838	1.487478
0.508558	1.487163
0.511293	1.486852
0.514043	1.486543
0.516807	1.486239
0.519587	1.485937
0.522381	1.485639
0.52519	1.485344
0.528015	1.485052
0.530854	1.484764
0.533709	1.484478
0.53658	1.484196
0.539465	1.483917
0.542367	1.483641
0.545283	1.483367
0.548216	1.483097
0.551164	1.48283
0.554128	1.482565
0.557109	1.482303
0.560105	1.482044
0.563117	1.481788
0.566145	1.481535
0.56919	1.481284
0.572251	1.481036
0.575329	1.480791
0.578423	1.480548
0.581534	1.480307
0.584661	1.48007
0.587805	1.479834
0.590967	1.479602
0.594145	1.479371
0.59734	1.479144
0.600553	1.478918
0.603782	1.478695
0.607029	1.478474
0.610294	1.478256
0.613576	1.47804
0.616876	1.477826
0.620194	1.477614
0.623529	1.477405
0.626882	1.477197
0.630254	1.476992
0.633643	1.476789
0.637051	1.476589
0.640477	1.47639
0.643921	1.476193
0.647384	1.475999
0.650866	1.475806
0.654366	1.475615
0.657885	1.475427
0.661424	1.47524
0.664981	1.475055
0.668557	1.474873
0.672152	1.474692
0.675767	1.474513
0.679402	1.474336
0.683055	1.47416
0.686729	1.473987
0.690422	1.473815
0.694135	1.473645
0.697868	1.473477
0.701621	1.47331
0.705395	1.473146
0.709188	1.472983
0.713002	1.472821
0.716837	1.472662
0.720692	1.472504
0.724568	1.472347
0.728464	1.472193
0.732382	1.472039
0.736321	1.471888
0.740281	1.471738
0.744262	1.471589
0.748265	1.471442
0.752289	1.471297
0.756335	1.471153
0.760402	1.471011
0.764492	1.47087
0.768603	1.47073
0.772736	1.470592
0.776892	1.470455
0.78107	1.47032
0.785271	1.470186
0.789494	1.470054
0.79374	1.469923
0.798009	1.469793
0.8023	1.469665
0.806615	1.469538
0.810953	1.469412
0.815314	1.469287
0.819699	1.469164
0.824108	1.469042
0.82854	1.468922
0.832995	1.468802
0.837475	1.468684
0.841979	1.468567
0.846507	1.468451
0.85106	1.468337
0.855637	1.468224
0.860238	1.468111
0.864865	1.468
0.869516	1.46789
0.874192	1.467782
0.878894	1.467674
0.88362	1.467568
0.888372	1.467462
0.89315	1.467358
0.897953	1.467255
0.902783	1.467152
0.907638	1.467051
0.912519	1.466951
0.917427	1.466852
0.92236	1.466754
0.927321	1.466657
0.932308	1.466561
0.937322	1.466466
0.942363	1.466372
0.947431	1.466279
0.952526	1.466187
0.957649	1.466096
0.962799	1.466006
0.967977	1.465917
0.973183	1.465828
0.978416	1.465741
0.983678	1.465654
0.988969	1.465569
0.994287	1.465484
0.999634	1.4654
1.00501	1.465317
1.01042	1.465235
1.01585	1.465154
1.02131	1.465073
1.02681	1.464994
1.03233	1.464915
1.03788	1.464837
1.04346	1.46476
1.04907	1.464684
1.05471	1.464608
1.06039	1.464533
1.06609	1.464459
1.07182	1.464386
1.07759	1.464314
1.08338	1.464242
1.08921	1.464171
1.09507	1.464101
1.10096	1.464031
1.10688	1.463963
1.11283	1.463895
1.11881	1.463827
1.12483	1.463761
1.13088	1.463695
1.13696	1.46363
1.14308	1.463565
1.14922	1.463501
1.1554	1.463438
1.16162	1.463375
1.16787	1.463313
1.17415	1.463252
1.18046	1.463192
1.18681	1.463132
1.19319	1.463072
1.19961	1.463013
1.20606	1.462955
1.21255	1.462898
1.21907	1.462841
1.22562	1.462784
1.23222	1.462729
1.23884	1.462674
1.2455	1.462619
1.2522	1.462565
1.25894	1.462511
1.26571	1.462459
1.27251	1.462406
1.27936	1.462354
1.28624	1.462303
1.29316	1.462252
1.30011	1.462202
1.3071	1.462153
1.31413	1.462104
1.3212	1.462055
1.32831	1.462007
1.33545	1.461959
1.34263	1.461912
1.34985	1.461865
1.35711	1.461819
1.36441	1.461774
1.37175	1.461728
1.37912	1.461684
1.38654	1.46164
1.394	1.461596
1.4015	1.461552
1.40903	1.46151
1.41661	1.461467
1.42423	1.461425
1.43189	1.461384
1.43959	1.461343
1.44733	1.461302
1.45511	1.461262
1.46294	1.461222
1.47081	1.461183
1.47872	1.461144
1.48667	1.461105
1.49467	1.461067
1.5027	1.461029
1.51079	1.460992
1.51891	1.460955
1.52708	1.460918
1.53529	1.460882
1.54355	1.460846
1.55185	1.460811
1.5602	1.460776
1.56859	1.460741
1.57702	1.460707
1.5855	1.460673
1.59403	1.460639
1.6026	1.460606
1.61122	1.460573
1.61989	1.46054
1.6286	1.460508
1.63736	1.460476
1.64616	1.460445
1.65502	1.460414
1.66392	1.460383
1.67286	1.460352
1.68186	1.460322
1.69091	1.460292
1.7	1.460262

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: —

C₂H₆OS (Dimethyl sulfoxide, DMSO): all datasets

About C2H6OS (Dimethyl sulfoxide, DMSO)

Dimethyl sulfoxide (C₂H₆OS, DMSO, Me2SO) is a highly polar organic solvent with a wide range of applications. It is a clear, colorless liquid that is miscible with many organic solvents and water. Due to its ability to penetrate biological membranes, DMSO is frequently used as a solvent in biological studies and as a carrier for drug delivery. It also has anti-inflammatory properties and has been used in various medical applications, such as a treatment for pain and inflammation associated with certain conditions. In the industrial sector, DMSO is used as a solvent in chemical reactions, and in the electronics industry, it serves as a photoresist stripper and cleaner. Chemical formula: (CH₃)₂SO

More about C2H6OS (Dimethyl sulfoxide, DMSO) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C2H6OS - dimethyl sulfoxide/nk/Li.yml
ID: ds_a3c233f64e63
API: /v1/datasets/ds_a3c233f64e63

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