Optical constants

Refractive index of C₂H₆OS (Dimethyl sulfoxide, DMSO)

Kozma et al. 2005: n 0.237–0.641 µm

Data: formula 2
Range: 0.2369–0.6407 µm
Temperature: 293 K
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.47718
Extinction coefficient k: 0

Permittivity ε₁: 2.18207
Permittivity ε₂: 0

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

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.0569193 µm⁻¹

Group index n_g: 1.51063
Group velocity dispersion: 111.37 fs²/mm

Dispersion parameter D: -607.58 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): Kozma et al. 2005: n 0.237–0.641 µm
c2h6os = ls.fetch_refractiveindex("organic", "dimethyl_sulfoxide", "Kozma", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c2h6os.range_nm)  # (236.87, 640.7) 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_c1b5d12e320d/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/kozma-2005).

# ... 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=640, 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_c1b5d12e320d/lightsmith?model=drude_lorentz"
c2h6os_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 (C in µm²) (formula 2), λ in µm

n^{2} - 1 = \frac{0.04419 λ^{2}}{λ^{2} - 0.04639067309} + \frac{1.09101 λ^{2}}{λ^{2} - 0.01221543949}

Valid from 0.23687 to 0.6407 µm.

Coefficients as stored

C_i	Value
C1	0.0
C2	0.04419
C3	0.04639067309
C4	1.09101
C5	0.01221543949

Comments and conditions

22 °C

Conditions

temperature: 293 K

References

I. Z. Kozma, P. Krok, E. Riedle. Direct measurement of the group-velocity mismatch and derivation of the refractive-index dispersion for a variety of solvents in the ultraviolet. J. Opt. Soc. Am. B 22, 1479-1485 (2005)

doi:10.1364/josab.22.001479 Direct measurement of the group-velocity mismatch and derivation of the refractive-index dispersion for a variety of solvents in the ultraviolet, Journal of the Optical Society of America B (2005)

Cite

Ida Z. Kozma, Patrizia Krok and Eberhard Riedle. Direct measurement of the group-velocity mismatch and derivation of the refractive-index dispersion for a variety of solvents in the ultraviolet. Journal of the Optical Society of America B, 22, 1479 (2005), doi:10.1364/josab.22.001479; 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), Kozma et al. 2005: n 0.237–0.641 µm: n and k versus wavelength
λ (µm)	n
0.23687	1.627824
0.237461	1.625412
0.238054	1.623091
0.238649	1.620857
0.239245	1.618702
0.239842	1.616623
0.240441	1.614613
0.241041	1.61267
0.241643	1.610788
0.242247	1.608965
0.242851	1.607197
0.243458	1.60548
0.244066	1.603812
0.244675	1.602191
0.245286	1.600614
0.245899	1.599078
0.246513	1.597582
0.247128	1.596123
0.247745	1.594701
0.248364	1.593312
0.248984	1.591956
0.249606	1.590631
0.250229	1.589336
0.250854	1.58807
0.25148	1.58683
0.252108	1.585617
0.252738	1.584428
0.253369	1.583264
0.254001	1.582123
0.254636	1.581004
0.255271	1.579906
0.255909	1.578829
0.256548	1.577772
0.257188	1.576733
0.257831	1.575714
0.258474	1.574711
0.25912	1.573727
0.259767	1.572758
0.260415	1.571806
0.261066	1.570869
0.261718	1.569948
0.262371	1.569041
0.263026	1.568148
0.263683	1.567269
0.264341	1.566403
0.265001	1.56555
0.265663	1.564709
0.266326	1.563881
0.266991	1.563064
0.267658	1.562259
0.268326	1.561466
0.268996	1.560683
0.269668	1.559911
0.270342	1.559149
0.271017	1.558397
0.271693	1.557655
0.272372	1.556923
0.273052	1.5562
0.273734	1.555486
0.274417	1.554781
0.275102	1.554084
0.275789	1.553397
0.276478	1.552717
0.277168	1.552046
0.27786	1.551382
0.278554	1.550727
0.27925	1.550078
0.279947	1.549438
0.280646	1.548804
0.281347	1.548178
0.282049	1.547559
0.282753	1.546947
0.28346	1.546341
0.284167	1.545742
0.284877	1.545149
0.285588	1.544563
0.286301	1.543983
0.287016	1.543409
0.287733	1.542841
0.288451	1.542278
0.289172	1.541722
0.289894	1.541171
0.290617	1.540626
0.291343	1.540086
0.292071	1.539552
0.2928	1.539022
0.293531	1.538498
0.294264	1.53798
0.294999	1.537466
0.295735	1.536957
0.296474	1.536453
0.297214	1.535953
0.297956	1.535459
0.2987	1.534968
0.299446	1.534483
0.300194	1.534002
0.300943	1.533525
0.301695	1.533053
0.302448	1.532585
0.303203	1.532121
0.30396	1.531662
0.304719	1.531206
0.30548	1.530754
0.306243	1.530307
0.307008	1.529863
0.307774	1.529423
0.308543	1.528987
0.309313	1.528555
0.310086	1.528126
0.31086	1.527702
0.311636	1.52728
0.312414	1.526862
0.313194	1.526448
0.313976	1.526037
0.31476	1.52563
0.315546	1.525226
0.316334	1.524825
0.317124	1.524428
0.317916	1.524034
0.31871	1.523643
0.319506	1.523255
0.320303	1.52287
0.321103	1.522489
0.321905	1.52211
0.322709	1.521734
0.323514	1.521362
0.324322	1.520992
0.325132	1.520625
0.325944	1.520262
0.326758	1.5199
0.327574	1.519542
0.328392	1.519187
0.329212	1.518834
0.330034	1.518484
0.330858	1.518137
0.331684	1.517792
0.332512	1.51745
0.333342	1.51711
0.334175	1.516773
0.335009	1.516439
0.335846	1.516107
0.336684	1.515777
0.337525	1.51545
0.338368	1.515126
0.339213	1.514804
0.34006	1.514484
0.340909	1.514166
0.34176	1.513851
0.342613	1.513538
0.343469	1.513228
0.344327	1.512919
0.345186	1.512613
0.346048	1.512309
0.346912	1.512008
0.347779	1.511708
0.348647	1.511411
0.349517	1.511115
0.35039	1.510822
0.351265	1.510531
0.352142	1.510242
0.353021	1.509955
0.353903	1.50967
0.354787	1.509387
0.355673	1.509106
0.356561	1.508827
0.357451	1.508549
0.358344	1.508274
0.359238	1.508001
0.360135	1.507729
0.361035	1.50746
0.361936	1.507192
0.36284	1.506926
0.363746	1.506662
0.364654	1.5064
0.365565	1.506139
0.366477	1.505881
0.367392	1.505624
0.36831	1.505368
0.36923	1.505115
0.370151	1.504863
0.371076	1.504613
0.372002	1.504364
0.372931	1.504118
0.373862	1.503872
0.374796	1.503629
0.375732	1.503387
0.37667	1.503147
0.37761	1.502908
0.378553	1.502671
0.379499	1.502435
0.380446	1.502201
0.381396	1.501969
0.382348	1.501738
0.383303	1.501508
0.38426	1.50128
0.38522	1.501054
0.386182	1.500829
0.387146	1.500605
0.388113	1.500383
0.389082	1.500162
0.390053	1.499943
0.391027	1.499725
0.392004	1.499509
0.392982	1.499294
0.393964	1.49908
0.394947	1.498868
0.395934	1.498657
0.396922	1.498447
0.397913	1.498239
0.398907	1.498032
0.399903	1.497826
0.400902	1.497622
0.401903	1.497419
0.402906	1.497217
0.403912	1.497017
0.404921	1.496817
0.405932	1.496619
0.406945	1.496423
0.407961	1.496227
0.40898	1.496033
0.410001	1.49584
0.411025	1.495648
0.412051	1.495457
0.41308	1.495268
0.414112	1.495079
0.415146	1.494892
0.416182	1.494706
0.417222	1.494521
0.418263	1.494338
0.419308	1.494155
0.420355	1.493973
0.421404	1.493793
0.422457	1.493614
0.423512	1.493436
0.424569	1.493259
0.425629	1.493083
0.426692	1.492908
0.427757	1.492734
0.428825	1.492561
0.429896	1.492389
0.43097	1.492219
0.432046	1.492049
0.433125	1.49188
0.434206	1.491713
0.43529	1.491546
0.436377	1.491381
0.437467	1.491216
0.438559	1.491053
0.439654	1.49089
0.440752	1.490728
0.441853	1.490568
0.442956	1.490408
0.444062	1.490249
0.445171	1.490091
0.446282	1.489934
0.447397	1.489779
0.448514	1.489624
0.449634	1.489469
0.450756	1.489316
0.451882	1.489164
0.45301	1.489013
0.454141	1.488862
0.455275	1.488713
0.456412	1.488564
0.457552	1.488416
0.458694	1.488269
0.45984	1.488123
0.460988	1.487978
0.462139	1.487834
0.463293	1.48769
0.46445	1.487547
0.46561	1.487406
0.466772	1.487265
0.467938	1.487124
0.469106	1.486985
0.470277	1.486847
0.471452	1.486709
0.472629	1.486572
0.473809	1.486436
0.474992	1.4863
0.476178	1.486166
0.477367	1.486032
0.478559	1.485899
0.479754	1.485767
0.480952	1.485635
0.482153	1.485505
0.483357	1.485375
0.484564	1.485246
0.485774	1.485117
0.486987	1.484989
0.488203	1.484862
0.489422	1.484736
0.490644	1.484611
0.491869	1.484486
0.493097	1.484362
0.494328	1.484238
0.495563	1.484116
0.4968	1.483994
0.498041	1.483873
0.499284	1.483752
0.500531	1.483632
0.501781	1.483513
0.503034	1.483394
0.50429	1.483277
0.505549	1.483159
0.506811	1.483043
0.508077	1.482927
0.509345	1.482812
0.510617	1.482697
0.511892	1.482584
0.51317	1.48247
0.514452	1.482358
0.515736	1.482246
0.517024	1.482134
0.518315	1.482024
0.519609	1.481914
0.520907	1.481804
0.522207	1.481695
0.523511	1.481587
0.524819	1.48148
0.526129	1.481373
0.527443	1.481266
0.52876	1.48116
0.53008	1.481055
0.531404	1.480951
0.532731	1.480847
0.534061	1.480743
0.535394	1.48064
0.536731	1.480538
0.538071	1.480436
0.539415	1.480335
0.540762	1.480234
0.542112	1.480134
0.543466	1.480035
0.544823	1.479936
0.546183	1.479838
0.547547	1.47974
0.548914	1.479643
0.550285	1.479546
0.551659	1.47945
0.553036	1.479354
0.554417	1.479259
0.555802	1.479164
0.557189	1.47907
0.558581	1.478977
0.559975	1.478884
0.561374	1.478791
0.562775	1.478699
0.564181	1.478607
0.565589	1.478516
0.567002	1.478426
0.568417	1.478336
0.569837	1.478246
0.57126	1.478157
0.572686	1.478069
0.574116	1.477981
0.57555	1.477893
0.576987	1.477806
0.578427	1.47772
0.579872	1.477634
0.58132	1.477548
0.582771	1.477463
0.584226	1.477378
0.585685	1.477294
0.587148	1.47721
0.588614	1.477127
0.590083	1.477044
0.591557	1.476961
0.593034	1.476879
0.594515	1.476798
0.595999	1.476717
0.597487	1.476636
0.598979	1.476556
0.600475	1.476476
0.601974	1.476397
0.603477	1.476318
0.604984	1.47624
0.606495	1.476162
0.608009	1.476084
0.609528	1.476007
0.61105	1.47593
0.612575	1.475854
0.614105	1.475778
0.615638	1.475702
0.617176	1.475627
0.618717	1.475552
0.620261	1.475478
0.62181	1.475404
0.623363	1.475331
0.624919	1.475258
0.62648	1.475185
0.628044	1.475113
0.629612	1.475041
0.631184	1.474969
0.632761	1.474898
0.634341	1.474827
0.635924	1.474757
0.637512	1.474687
0.639104	1.474617
0.6407	1.474548

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/Kozma.yml
ID: ds_c1b5d12e320d
API: /v1/datasets/ds_c1b5d12e320d

Plot