Optical constants

Refractive index of C₄H₈O (Tetrahydrofuran, THF)

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: 1.40769
Extinction coefficient k: 0

Permittivity ε₁: 1.9816
Permittivity ε₂: 0

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

Abbe number V_d: 40.411
Chromatic dispersion dn/dλ: -0.0522459 µm⁻¹

Group index n_g: 1.43839
Group velocity dispersion: 93.7859 fs²/mm

Dispersion parameter D: -511.652 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

# C4H8O (Tetrahydrofuran, THF): Li et al. 2022: n 0.2–1.7 µm
c4h8o = ls.fetch_refractiveindex("organic", "tetrahydrofuran", "Li", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c4h8o.range_nm)  # (200, 1700) nm
eps = c4h8o.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_420474e93721/lightsmith"
c4h8o = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c4h8o.source)  # citation and provenance travel with the data

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

# ... load c4h8o as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c4h8o)],
    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 = 1.392 + 0.005572 λ^{- 2.0} - 6.463 \times 10^{-5} λ^{- 4.0} + 4.064 \times 10^{-6} λ^{- 6.0}

Valid from 0.2 to 1.7 µm.

Coefficients as stored

C_i	Value
C1	1.392
C2	0.005572
C3	-2.0
C4	-6.463e-05
C5	-4.0
C6	4.064e-06
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

C4H8O (Tetrahydrofuran, THF), Li et al. 2022: n 0.2–1.7 µm: n and k versus wavelength
λ (µm)	n
0.2	1.554406
0.201076	1.551766
0.202157	1.549188
0.203244	1.546669
0.204337	1.544208
0.205436	1.541802
0.206541	1.539452
0.207652	1.537154
0.208768	1.534908
0.209891	1.532711
0.21102	1.530563
0.212155	1.528462
0.213296	1.526407
0.214443	1.524397
0.215596	1.522429
0.216756	1.520503
0.217921	1.518618
0.219093	1.516773
0.220272	1.514966
0.221456	1.513197
0.222647	1.511464
0.223845	1.509766
0.225049	1.508103
0.226259	1.506473
0.227476	1.504876
0.228699	1.503311
0.229929	1.501776
0.231165	1.500271
0.232409	1.498796
0.233659	1.497348
0.234915	1.495929
0.236179	1.494536
0.237449	1.49317
0.238726	1.491829
0.24001	1.490512
0.2413	1.48922
0.242598	1.487952
0.243903	1.486707
0.245214	1.485483
0.246533	1.484282
0.247859	1.483102
0.249192	1.481943
0.250532	1.480804
0.25188	1.479684
0.253234	1.478584
0.254596	1.477502
0.255965	1.476439
0.257342	1.475394
0.258726	1.474365
0.260117	1.473354
0.261516	1.47236
0.262923	1.471382
0.264337	1.470419
0.265758	1.469472
0.267187	1.46854
0.268624	1.467622
0.270069	1.466719
0.271521	1.46583
0.272982	1.464955
0.27445	1.464093
0.275926	1.463245
0.27741	1.462409
0.278902	1.461586
0.280402	1.460775
0.28191	1.459976
0.283426	1.459188
0.28495	1.458412
0.286482	1.457648
0.288023	1.456894
0.289572	1.456152
0.291129	1.455419
0.292695	1.454698
0.294269	1.453986
0.295852	1.453284
0.297443	1.452592
0.299042	1.451909
0.300651	1.451236
0.302268	1.450572
0.303893	1.449917
0.305527	1.44927
0.307171	1.448633
0.308823	1.448004
0.310483	1.447383
0.312153	1.44677
0.313832	1.446165
0.31552	1.445568
0.317217	1.444979
0.318923	1.444397
0.320638	1.443823
0.322362	1.443256
0.324096	1.442696
0.325839	1.442144
0.327591	1.441598
0.329353	1.441059
0.331124	1.440526
0.332905	1.440001
0.334695	1.439481
0.336495	1.438968
0.338305	1.438462
0.340124	1.437961
0.341954	1.437467
0.343793	1.436978
0.345641	1.436495
0.3475	1.436018
0.349369	1.435547
0.351248	1.435081
0.353137	1.434621
0.355036	1.434166
0.356946	1.433716
0.358865	1.433272
0.360795	1.432833
0.362736	1.432399
0.364686	1.43197
0.366648	1.431545
0.368619	1.431126
0.370602	1.430712
0.372595	1.430302
0.374599	1.429897
0.376613	1.429496
0.378639	1.4291
0.380675	1.428708
0.382722	1.428321
0.384781	1.427938
0.38685	1.42756
0.38893	1.427185
0.391022	1.426815
0.393125	1.426449
0.395239	1.426087
0.397365	1.425728
0.399502	1.425374
0.40165	1.425024
0.40381	1.424678
0.405982	1.424335
0.408166	1.423996
0.410361	1.423661
0.412568	1.423329
0.414786	1.423001
0.417017	1.422676
0.41926	1.422355
0.421515	1.422038
0.423781	1.421724
0.42606	1.421413
0.428352	1.421106
0.430656	1.420802
0.432972	1.420501
0.4353	1.420203
0.437641	1.419909
0.439995	1.419617
0.442361	1.419329
0.44474	1.419044
0.447132	1.418762
0.449537	1.418483
0.451954	1.418206
0.454385	1.417933
0.456828	1.417663
0.459285	1.417395
0.461755	1.417131
0.464239	1.416869
0.466735	1.416609
0.469245	1.416353
0.471769	1.416099
0.474306	1.415848
0.476857	1.4156
0.479421	1.415354
0.482	1.41511
0.484592	1.41487
0.487198	1.414631
0.489818	1.414396
0.492452	1.414162
0.495101	1.413932
0.497763	1.413703
0.50044	1.413477
0.503132	1.413253
0.505838	1.413032
0.508558	1.412813
0.511293	1.412596
0.514043	1.412382
0.516807	1.412169
0.519587	1.411959
0.522381	1.411751
0.52519	1.411545
0.528015	1.411342
0.530854	1.41114
0.533709	1.410941
0.53658	1.410743
0.539465	1.410548
0.542367	1.410355
0.545283	1.410163
0.548216	1.409974
0.551164	1.409787
0.554128	1.409601
0.557109	1.409418
0.560105	1.409236
0.563117	1.409056
0.566145	1.408879
0.56919	1.408702
0.572251	1.408528
0.575329	1.408356
0.578423	1.408185
0.581534	1.408016
0.584661	1.407849
0.587805	1.407684
0.590967	1.40752
0.594145	1.407358
0.59734	1.407198
0.600553	1.407039
0.603782	1.406882
0.607029	1.406727
0.610294	1.406573
0.613576	1.406421
0.616876	1.40627
0.620194	1.406121
0.623529	1.405973
0.626882	1.405827
0.630254	1.405683
0.633643	1.40554
0.637051	1.405398
0.640477	1.405258
0.643921	1.405119
0.647384	1.404982
0.650866	1.404846
0.654366	1.404712
0.657885	1.404579
0.661424	1.404447
0.664981	1.404317
0.668557	1.404188
0.672152	1.404061
0.675767	1.403934
0.679402	1.403809
0.683055	1.403686
0.686729	1.403563
0.690422	1.403442
0.694135	1.403322
0.697868	1.403204
0.701621	1.403086
0.705395	1.40297
0.709188	1.402855
0.713002	1.402741
0.716837	1.402629
0.720692	1.402517
0.724568	1.402407
0.728464	1.402298
0.732382	1.40219
0.736321	1.402083
0.740281	1.401977
0.744262	1.401872
0.748265	1.401769
0.752289	1.401666
0.756335	1.401565
0.760402	1.401464
0.764492	1.401365
0.768603	1.401267
0.772736	1.401169
0.776892	1.401073
0.78107	1.400978
0.785271	1.400883
0.789494	1.40079
0.79374	1.400698
0.798009	1.400606
0.8023	1.400516
0.806615	1.400426
0.810953	1.400338
0.815314	1.40025
0.819699	1.400163
0.824108	1.400077
0.82854	1.399992
0.832995	1.399908
0.837475	1.399825
0.841979	1.399743
0.846507	1.399661
0.85106	1.39958
0.855637	1.399501
0.860238	1.399422
0.864865	1.399343
0.869516	1.399266
0.874192	1.39919
0.878894	1.399114
0.88362	1.399039
0.888372	1.398965
0.89315	1.398891
0.897953	1.398819
0.902783	1.398747
0.907638	1.398676
0.912519	1.398605
0.917427	1.398536
0.92236	1.398467
0.927321	1.398399
0.932308	1.398331
0.937322	1.398264
0.942363	1.398198
0.947431	1.398133
0.952526	1.398068
0.957649	1.398004
0.962799	1.397941
0.967977	1.397878
0.973183	1.397816
0.978416	1.397755
0.983678	1.397694
0.988969	1.397634
0.994287	1.397574
0.999634	1.397515
1.00501	1.397457
1.01042	1.3974
1.01585	1.397342
1.02131	1.397286
1.02681	1.39723
1.03233	1.397175
1.03788	1.39712
1.04346	1.397066
1.04907	1.397013
1.05471	1.39696
1.06039	1.396907
1.06609	1.396855
1.07182	1.396804
1.07759	1.396753
1.08338	1.396703
1.08921	1.396653
1.09507	1.396604
1.10096	1.396555
1.10688	1.396507
1.11283	1.396459
1.11881	1.396412
1.12483	1.396366
1.13088	1.396319
1.13696	1.396274
1.14308	1.396228
1.14922	1.396184
1.1554	1.396139
1.16162	1.396096
1.16787	1.396052
1.17415	1.396009
1.18046	1.395967
1.18681	1.395925
1.19319	1.395883
1.19961	1.395842
1.20606	1.395801
1.21255	1.395761
1.21907	1.395721
1.22562	1.395682
1.23222	1.395643
1.23884	1.395604
1.2455	1.395566
1.2522	1.395528
1.25894	1.395491
1.26571	1.395454
1.27251	1.395417
1.27936	1.395381
1.28624	1.395345
1.29316	1.39531
1.30011	1.395275
1.3071	1.39524
1.31413	1.395206
1.3212	1.395172
1.32831	1.395138
1.33545	1.395105
1.34263	1.395072
1.34985	1.395039
1.35711	1.395007
1.36441	1.394975
1.37175	1.394944
1.37912	1.394912
1.38654	1.394881
1.394	1.394851
1.4015	1.394821
1.40903	1.394791
1.41661	1.394761
1.42423	1.394732
1.43189	1.394703
1.43959	1.394674
1.44733	1.394646
1.45511	1.394618
1.46294	1.39459
1.47081	1.394562
1.47872	1.394535
1.48667	1.394508
1.49467	1.394482
1.5027	1.394455
1.51079	1.394429
1.51891	1.394403
1.52708	1.394378
1.53529	1.394353
1.54355	1.394328
1.55185	1.394303
1.5602	1.394278
1.56859	1.394254
1.57702	1.39423
1.5855	1.394207
1.59403	1.394183
1.6026	1.39416
1.61122	1.394137
1.61989	1.394114
1.6286	1.394092
1.63736	1.39407
1.64616	1.394048
1.65502	1.394026
1.66392	1.394004
1.67286	1.393983
1.68186	1.393962
1.69091	1.393941
1.7	1.39392

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: —

C₄H₈O (Tetrahydrofuran, THF): all datasets

About C4H8O (Tetrahydrofuran, THF)

Tetrahydrofuran (C₄H₈O), commonly referred to as THF, is a cyclic ether that appears as a clear, colorless liquid with an ether-like odor. It is highly volatile, water-miscible, and has a low viscosity, which makes it an excellent solvent for a wide variety of organic substances, including resins, polymers, and some metals. THF is particularly crucial in the production of polyvinyl chloride (PVC) piping and adhesives due to its ability to dissolve PVC without reacting with it. It is also widely used as a precursor to polymers and as a reaction medium in organic synthesis. Due to its rapid evaporation rate and excellent solvency, THF is often employed in specialized applications in both laboratory and industrial settings. However, it poses significant health risks if inhaled, ingested, or contacted with skin, necessitating careful handling.

More about C4H8O (Tetrahydrofuran, THF) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C4H8O - tetrahydrofuran/nk/Li.yml
ID: ds_420474e93721
API: /v1/datasets/ds_420474e93721

Plot