Optical constants

Refractive index of CH₃OH (Methanol)

Moutzouris et al. 2013: n 0.450–1.55 µm

Data: formula 3
Range: 0.45–1.551 µm
Temperature: 300 K
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.32701
Extinction coefficient k: 0

Permittivity ε₁: 1.76097
Permittivity ε₂: 0

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

Abbe number V_d: 59.596
Chromatic dispersion dn/dλ: -0.0278797 µm⁻¹

Group index n_g: 1.3434
Group velocity dispersion: 53.4368 fs²/mm

Dispersion parameter D: -291.526 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

# CH3OH (Methanol): Moutzouris et al. 2013: n 0.450–1.55 µm
ch3oh = ls.fetch_refractiveindex("organic", "methanol", "Moutzouris", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ch3oh.range_nm)  # (450, 1551) nm
eps = ch3oh.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_4fba94db7119/lightsmith"
ch3oh = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(ch3oh.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (methanol/moutzouris-2013).

# ... load ch3oh as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=ch3oh)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=450, 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

Polynomial (formula 3), λ in µm

n^{2} = 1.745946239 - 0.005362181 λ^{2.0} + 0.004656355 λ^{- 2.0} + 0.00044714 λ^{- 4.0} - 1.5087 \times 10^{-5} λ^{- 6.0}

Valid from 0.45 to 1.551 µm.

Coefficients as stored

C_i	Value
C1	1.745946239
C2	-0.005362181
C3	2.0
C4	0.004656355
C5	-2.0
C6	0.00044714
C7	-4.0
C8	-1.5087e-05
C9	-6.0

Comments and conditions

300 K (27 °C).

Conditions

temperature: 300 K

References

K. Moutzouris, M. Papamichael, S. C. Betsis, I. Stavrakas, G. Hloupis D. Triantis. Refractive, dispersive and thermo-optic properties of twelve organic solvents in the visible and near-infrared. Appl. Phys. B 116, 617-622 (2013)

doi:10.1007/s00340-013-5744-3 Refractive, dispersive and thermo-optic properties of twelve organic solvents in the visible and near-infrared, Applied Physics B (2013)

Cite

Konstantinos Moutzouris et al.. Refractive, dispersive and thermo-optic properties of twelve organic solvents in the visible and near-infrared. Applied Physics B, 116, 617-622 (2013), doi:10.1007/s00340-013-5744-3; 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

CH3OH (Methanol), Moutzouris et al. 2013: n 0.450–1.55 µm: n and k versus wavelength
λ (µm)	n
0.45	1.33302
0.451398	1.332926
0.4528	1.332833
0.454206	1.332741
0.455617	1.332649
0.457032	1.332558
0.458452	1.332468
0.459876	1.332378
0.461304	1.332289
0.462737	1.332201
0.464174	1.332113
0.465616	1.332026
0.467062	1.33194
0.468513	1.331854
0.469968	1.331769
0.471428	1.331685
0.472892	1.331601
0.474361	1.331518
0.475835	1.331435
0.477313	1.331353
0.478795	1.331272
0.480282	1.331191
0.481774	1.331111
0.483271	1.331031
0.484772	1.330952
0.486277	1.330874
0.487788	1.330796
0.489303	1.330719
0.490823	1.330642
0.492347	1.330566
0.493877	1.33049
0.495411	1.330415
0.496949	1.330341
0.498493	1.330267
0.500041	1.330193
0.501595	1.330121
0.503153	1.330048
0.504715	1.329976
0.506283	1.329905
0.507856	1.329834
0.509433	1.329764
0.511015	1.329694
0.512603	1.329625
0.514195	1.329556
0.515792	1.329488
0.517394	1.32942
0.519001	1.329353
0.520613	1.329286
0.52223	1.32922
0.523852	1.329154
0.52548	1.329089
0.527112	1.329024
0.528749	1.328959
0.530391	1.328895
0.532039	1.328832
0.533691	1.328769
0.535349	1.328706
0.537012	1.328644
0.53868	1.328582
0.540353	1.328521
0.542031	1.32846
0.543715	1.328399
0.545404	1.328339
0.547098	1.328279
0.548797	1.32822
0.550502	1.328161
0.552212	1.328103
0.553927	1.328045
0.555647	1.327987
0.557373	1.32793
0.559105	1.327873
0.560841	1.327817
0.562583	1.327761
0.564331	1.327705
0.566084	1.32765
0.567842	1.327595
0.569606	1.327541
0.571375	1.327486
0.57315	1.327433
0.57493	1.327379
0.576716	1.327326
0.578507	1.327273
0.580304	1.327221
0.582106	1.327169
0.583914	1.327117
0.585728	1.327066
0.587547	1.327015
0.589372	1.326964
0.591203	1.326914
0.593039	1.326864
0.594881	1.326814
0.596729	1.326765
0.598583	1.326716
0.600442	1.326667
0.602307	1.326619
0.604178	1.326571
0.606054	1.326523
0.607937	1.326476
0.609825	1.326429
0.611719	1.326382
0.613619	1.326335
0.615525	1.326289
0.617437	1.326243
0.619355	1.326197
0.621279	1.326152
0.623209	1.326107
0.625144	1.326062
0.627086	1.326017
0.629034	1.325973
0.630988	1.325929
0.632948	1.325885
0.634914	1.325842
0.636886	1.325799
0.638864	1.325756
0.640848	1.325713
0.642839	1.325671
0.644835	1.325629
0.646838	1.325587
0.648847	1.325545
0.650863	1.325504
0.652885	1.325462
0.654912	1.325421
0.656947	1.325381
0.658987	1.32534
0.661034	1.3253
0.663087	1.32526
0.665147	1.32522
0.667213	1.325181
0.669285	1.325141
0.671364	1.325102
0.673449	1.325063
0.675541	1.325025
0.67764	1.324986
0.679744	1.324948
0.681856	1.32491
0.683974	1.324872
0.686098	1.324835
0.688229	1.324797
0.690367	1.32476
0.692511	1.324723
0.694662	1.324686
0.69682	1.32465
0.698984	1.324613
0.701155	1.324577
0.703333	1.324541
0.705518	1.324505
0.707709	1.32447
0.709907	1.324434
0.712112	1.324399
0.714324	1.324364
0.716543	1.324329
0.718769	1.324294
0.721001	1.324259
0.723241	1.324225
0.725487	1.324191
0.727741	1.324157
0.730001	1.324123
0.732269	1.324089
0.734543	1.324055
0.736825	1.324022
0.739113	1.323989
0.741409	1.323956
0.743712	1.323923
0.746022	1.32389
0.748339	1.323857
0.750664	1.323825
0.752995	1.323792
0.755334	1.32376
0.75768	1.323728
0.760034	1.323696
0.762394	1.323664
0.764762	1.323633
0.767138	1.323601
0.769521	1.32357
0.771911	1.323538
0.774308	1.323507
0.776713	1.323476
0.779126	1.323445
0.781546	1.323415
0.783974	1.323384
0.786409	1.323354
0.788851	1.323323
0.791302	1.323293
0.793759	1.323263
0.796225	1.323233
0.798698	1.323203
0.801179	1.323173
0.803667	1.323143
0.806164	1.323114
0.808668	1.323084
0.811179	1.323055
0.813699	1.323026
0.816226	1.322996
0.818762	1.322967
0.821305	1.322938
0.823856	1.322909
0.826415	1.322881
0.828982	1.322852
0.831557	1.322823
0.83414	1.322795
0.83673	1.322766
0.839329	1.322738
0.841936	1.32271
0.844552	1.322682
0.847175	1.322654
0.849806	1.322626
0.852446	1.322598
0.855094	1.32257
0.85775	1.322542
0.860414	1.322515
0.863086	1.322487
0.865767	1.32246
0.868456	1.322432
0.871154	1.322405
0.87386	1.322377
0.876574	1.32235
0.879297	1.322323
0.882028	1.322296
0.884768	1.322269
0.887516	1.322242
0.890272	1.322215
0.893038	1.322188
0.895811	1.322161
0.898594	1.322135
0.901385	1.322108
0.904185	1.322081
0.906993	1.322055
0.909811	1.322028
0.912636	1.322002
0.915471	1.321975
0.918315	1.321949
0.921167	1.321923
0.924028	1.321897
0.926898	1.32187
0.929777	1.321844
0.932665	1.321818
0.935562	1.321792
0.938468	1.321766
0.941383	1.32174
0.944307	1.321714
0.94724	1.321688
0.950183	1.321662
0.953134	1.321636
0.956094	1.32161
0.959064	1.321584
0.962043	1.321559
0.965031	1.321533
0.968029	1.321507
0.971036	1.321482
0.974052	1.321456
0.977077	1.32143
0.980112	1.321405
0.983156	1.321379
0.98621	1.321353
0.989273	1.321328
0.992346	1.321302
0.995428	1.321277
0.99852	1.321251
1.00162	1.321226
1.00473	1.3212
1.00785	1.321175
1.01098	1.321149
1.01412	1.321124
1.01727	1.321098
1.02043	1.321073
1.0236	1.321047
1.02678	1.321022
1.02997	1.320997
1.03317	1.320971
1.03638	1.320946
1.0396	1.32092
1.04283	1.320895
1.04607	1.320869
1.04932	1.320844
1.05258	1.320818
1.05585	1.320793
1.05913	1.320768
1.06242	1.320742
1.06572	1.320717
1.06903	1.320691
1.07235	1.320666
1.07568	1.32064
1.07902	1.320615
1.08237	1.320589
1.08573	1.320563
1.0891	1.320538
1.09249	1.320512
1.09588	1.320487
1.09928	1.320461
1.1027	1.320435
1.10612	1.32041
1.10956	1.320384
1.11301	1.320358
1.11646	1.320333
1.11993	1.320307
1.12341	1.320281
1.1269	1.320255
1.1304	1.320229
1.13391	1.320203
1.13743	1.320177
1.14096	1.320151
1.14451	1.320125
1.14806	1.320099
1.15163	1.320073
1.15521	1.320047
1.15879	1.320021
1.16239	1.319995
1.166	1.319968
1.16963	1.319942
1.17326	1.319916
1.1769	1.319889
1.18056	1.319863
1.18423	1.319837
1.1879	1.31981
1.19159	1.319783
1.1953	1.319757
1.19901	1.31973
1.20273	1.319703
1.20647	1.319677
1.21022	1.31965
1.21397	1.319623
1.21774	1.319596
1.22153	1.319569
1.22532	1.319542
1.22913	1.319515
1.23295	1.319487
1.23677	1.31946
1.24062	1.319433
1.24447	1.319405
1.24834	1.319378
1.25221	1.31935
1.2561	1.319323
1.26	1.319295
1.26392	1.319267
1.26784	1.31924
1.27178	1.319212
1.27573	1.319184
1.27969	1.319156
1.28367	1.319128
1.28766	1.319099
1.29166	1.319071
1.29567	1.319043
1.29969	1.319014
1.30373	1.318986
1.30778	1.318957
1.31184	1.318928
1.31592	1.3189
1.32	1.318871
1.3241	1.318842
1.32822	1.318813
1.33234	1.318784
1.33648	1.318754
1.34063	1.318725
1.34479	1.318695
1.34897	1.318666
1.35316	1.318636
1.35736	1.318607
1.36158	1.318577
1.36581	1.318547
1.37005	1.318517
1.37431	1.318487
1.37858	1.318456
1.38286	1.318426
1.38715	1.318396
1.39146	1.318365
1.39578	1.318334
1.40012	1.318304
1.40447	1.318273
1.40883	1.318242
1.41321	1.31821
1.4176	1.318179
1.422	1.318148
1.42642	1.318116
1.43085	1.318085
1.43529	1.318053
1.43975	1.318021
1.44422	1.317989
1.44871	1.317957
1.45321	1.317925
1.45772	1.317892
1.46225	1.31786
1.46679	1.317827
1.47135	1.317795
1.47592	1.317762
1.4805	1.317729
1.4851	1.317696
1.48971	1.317662
1.49434	1.317629
1.49898	1.317595
1.50364	1.317562
1.50831	1.317528
1.51299	1.317494
1.51769	1.31746
1.52241	1.317425
1.52714	1.317391
1.53188	1.317356
1.53664	1.317321
1.54141	1.317287
1.5462	1.317252
1.551	1.317216

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: —

CH₃OH (Methanol): all datasets

About CH3OH (Methanol)

Methanol (CH₄O), also known as wood alcohol, is a clear, colorless liquid with a slightly sweet odor. It is the simplest alcohol and is used as an antifreeze, solvent, fuel, and as a feedstock for producing various chemicals. Methanol is flammable and is toxic when ingested, inhaled, or absorbed through the skin. It can cause blindness if ingested. In the field of optics, methanol is often utilized as a solvent in various spectroscopic studies due to its ability to dissolve a wide range of organic compounds. Chemical formula: CH₃OH or MeOH

More about CH3OH (Methanol) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/CH4O - methanol/nk/Moutzouris.yml
ID: ds_4fba94db7119
API: /v1/datasets/ds_4fba94db7119

Plot