Optical constants

Refractive index of C₅H₁₀(OH)₂ (Pentanediol)

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: 1.44365
Extinction coefficient k: 0

Permittivity ε₁: 2.08412
Permittivity ε₂: 0

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

Abbe number V_d: 51.815
Chromatic dispersion dn/dλ: -0.0429388 µm⁻¹

Group index n_g: 1.46888
Group velocity dispersion: 85.1557 fs²/mm

Dispersion parameter D: -464.569 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

# C5H10(OH)2 (Pentanediol): Moutzouris et al. 2013: n 0.450–1.55 µm
c5h10 = ls.fetch_refractiveindex("organic", "pentanediol", "Moutzouris", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c5h10.range_nm)  # (450, 1551) nm
eps = c5h10.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_0ec69d50aa09/lightsmith"
c5h10 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c5h10.source)  # citation and provenance travel with the data

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

# ... load c5h10 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c5h10)],
    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} = 2.051562214 - 0.00354681 λ^{2.0} + 0.01192405 λ^{- 2.0} - 0.000350124 λ^{- 4.0} + 8.97124 \times 10^{-5} λ^{- 6.0}

Valid from 0.45 to 1.551 µm.

Coefficients as stored

C_i	Value
C1	2.051562214
C2	-0.00354681
C3	2.0
C4	0.01192405
C5	-2.0
C6	-0.000350124
C7	-4.0
C8	8.97124e-05
C9	-6.0

Comments and conditions

1,5-Pentanediol; 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

C5H10(OH)2 (Pentanediol), Moutzouris et al. 2013: n 0.450–1.55 µm: n and k versus wavelength
λ (µm)	n
0.45	1.45327
0.451398	1.453111
0.4528	1.452953
0.454206	1.452797
0.455617	1.452643
0.457032	1.45249
0.458452	1.452338
0.459876	1.452188
0.461304	1.45204
0.462737	1.451892
0.464174	1.451747
0.465616	1.451602
0.467062	1.451459
0.468513	1.451317
0.469968	1.451177
0.471428	1.451038
0.472892	1.4509
0.474361	1.450763
0.475835	1.450628
0.477313	1.450494
0.478795	1.450361
0.480282	1.45023
0.481774	1.450099
0.483271	1.44997
0.484772	1.449842
0.486277	1.449715
0.487788	1.449589
0.489303	1.449464
0.490823	1.449341
0.492347	1.449218
0.493877	1.449096
0.495411	1.448976
0.496949	1.448857
0.498493	1.448738
0.500041	1.448621
0.501595	1.448504
0.503153	1.448389
0.504715	1.448275
0.506283	1.448161
0.507856	1.448049
0.509433	1.447937
0.511015	1.447827
0.512603	1.447717
0.514195	1.447608
0.515792	1.4475
0.517394	1.447393
0.519001	1.447287
0.520613	1.447182
0.52223	1.447077
0.523852	1.446974
0.52548	1.446871
0.527112	1.446769
0.528749	1.446668
0.530391	1.446567
0.532039	1.446468
0.533691	1.446369
0.535349	1.446271
0.537012	1.446174
0.53868	1.446077
0.540353	1.445981
0.542031	1.445886
0.543715	1.445792
0.545404	1.445699
0.547098	1.445606
0.548797	1.445513
0.550502	1.445422
0.552212	1.445331
0.553927	1.445241
0.555647	1.445152
0.557373	1.445063
0.559105	1.444975
0.560841	1.444887
0.562583	1.444801
0.564331	1.444714
0.566084	1.444629
0.567842	1.444544
0.569606	1.44446
0.571375	1.444376
0.57315	1.444293
0.57493	1.44421
0.576716	1.444128
0.578507	1.444047
0.580304	1.443966
0.582106	1.443886
0.583914	1.443806
0.585728	1.443727
0.587547	1.443649
0.589372	1.443571
0.591203	1.443493
0.593039	1.443416
0.594881	1.44334
0.596729	1.443264
0.598583	1.443189
0.600442	1.443114
0.602307	1.44304
0.604178	1.442966
0.606054	1.442892
0.607937	1.44282
0.609825	1.442747
0.611719	1.442675
0.613619	1.442604
0.615525	1.442533
0.617437	1.442463
0.619355	1.442393
0.621279	1.442323
0.623209	1.442254
0.625144	1.442185
0.627086	1.442117
0.629034	1.442049
0.630988	1.441982
0.632948	1.441915
0.634914	1.441849
0.636886	1.441782
0.638864	1.441717
0.640848	1.441652
0.642839	1.441587
0.644835	1.441522
0.646838	1.441458
0.648847	1.441395
0.650863	1.441332
0.652885	1.441269
0.654912	1.441206
0.656947	1.441144
0.658987	1.441083
0.661034	1.441021
0.663087	1.44096
0.665147	1.4409
0.667213	1.44084
0.669285	1.44078
0.671364	1.44072
0.673449	1.440661
0.675541	1.440602
0.67764	1.440544
0.679744	1.440486
0.681856	1.440428
0.683974	1.440371
0.686098	1.440314
0.688229	1.440257
0.690367	1.440201
0.692511	1.440145
0.694662	1.440089
0.69682	1.440033
0.698984	1.439978
0.701155	1.439923
0.703333	1.439869
0.705518	1.439815
0.707709	1.439761
0.709907	1.439707
0.712112	1.439654
0.714324	1.439601
0.716543	1.439549
0.718769	1.439496
0.721001	1.439444
0.723241	1.439392
0.725487	1.439341
0.727741	1.43929
0.730001	1.439239
0.732269	1.439188
0.734543	1.439138
0.736825	1.439087
0.739113	1.439038
0.741409	1.438988
0.743712	1.438939
0.746022	1.43889
0.748339	1.438841
0.750664	1.438792
0.752995	1.438744
0.755334	1.438696
0.75768	1.438648
0.760034	1.438601
0.762394	1.438553
0.764762	1.438506
0.767138	1.43846
0.769521	1.438413
0.771911	1.438367
0.774308	1.438321
0.776713	1.438275
0.779126	1.438229
0.781546	1.438184
0.783974	1.438139
0.786409	1.438094
0.788851	1.438049
0.791302	1.438005
0.793759	1.43796
0.796225	1.437916
0.798698	1.437872
0.801179	1.437829
0.803667	1.437785
0.806164	1.437742
0.808668	1.437699
0.811179	1.437656
0.813699	1.437614
0.816226	1.437571
0.818762	1.437529
0.821305	1.437487
0.823856	1.437446
0.826415	1.437404
0.828982	1.437363
0.831557	1.437321
0.83414	1.43728
0.83673	1.43724
0.839329	1.437199
0.841936	1.437159
0.844552	1.437118
0.847175	1.437078
0.849806	1.437038
0.852446	1.436999
0.855094	1.436959
0.85775	1.43692
0.860414	1.43688
0.863086	1.436841
0.865767	1.436803
0.868456	1.436764
0.871154	1.436725
0.87386	1.436687
0.876574	1.436649
0.879297	1.436611
0.882028	1.436573
0.884768	1.436535
0.887516	1.436498
0.890272	1.43646
0.893038	1.436423
0.895811	1.436386
0.898594	1.436349
0.901385	1.436312
0.904185	1.436276
0.906993	1.436239
0.909811	1.436203
0.912636	1.436167
0.915471	1.436131
0.918315	1.436095
0.921167	1.436059
0.924028	1.436023
0.926898	1.435988
0.929777	1.435953
0.932665	1.435917
0.935562	1.435882
0.938468	1.435847
0.941383	1.435812
0.944307	1.435778
0.94724	1.435743
0.950183	1.435709
0.953134	1.435674
0.956094	1.43564
0.959064	1.435606
0.962043	1.435572
0.965031	1.435538
0.968029	1.435505
0.971036	1.435471
0.974052	1.435438
0.977077	1.435404
0.980112	1.435371
0.983156	1.435338
0.98621	1.435305
0.989273	1.435272
0.992346	1.435239
0.995428	1.435206
0.99852	1.435174
1.00162	1.435141
1.00473	1.435109
1.00785	1.435077
1.01098	1.435044
1.01412	1.435012
1.01727	1.43498
1.02043	1.434948
1.0236	1.434917
1.02678	1.434885
1.02997	1.434853
1.03317	1.434822
1.03638	1.43479
1.0396	1.434759
1.04283	1.434728
1.04607	1.434697
1.04932	1.434665
1.05258	1.434634
1.05585	1.434604
1.05913	1.434573
1.06242	1.434542
1.06572	1.434511
1.06903	1.434481
1.07235	1.43445
1.07568	1.43442
1.07902	1.434389
1.08237	1.434359
1.08573	1.434329
1.0891	1.434299
1.09249	1.434269
1.09588	1.434239
1.09928	1.434209
1.1027	1.434179
1.10612	1.434149
1.10956	1.434119
1.11301	1.43409
1.11646	1.43406
1.11993	1.434031
1.12341	1.434001
1.1269	1.433972
1.1304	1.433942
1.13391	1.433913
1.13743	1.433884
1.14096	1.433854
1.14451	1.433825
1.14806	1.433796
1.15163	1.433767
1.15521	1.433738
1.15879	1.433709
1.16239	1.43368
1.166	1.433652
1.16963	1.433623
1.17326	1.433594
1.1769	1.433565
1.18056	1.433537
1.18423	1.433508
1.1879	1.433479
1.19159	1.433451
1.1953	1.433422
1.19901	1.433394
1.20273	1.433366
1.20647	1.433337
1.21022	1.433309
1.21397	1.433281
1.21774	1.433252
1.22153	1.433224
1.22532	1.433196
1.22913	1.433168
1.23295	1.433139
1.23677	1.433111
1.24062	1.433083
1.24447	1.433055
1.24834	1.433027
1.25221	1.432999
1.2561	1.432971
1.26	1.432943
1.26392	1.432915
1.26784	1.432887
1.27178	1.432859
1.27573	1.432831
1.27969	1.432803
1.28367	1.432775
1.28766	1.432747
1.29166	1.43272
1.29567	1.432692
1.29969	1.432664
1.30373	1.432636
1.30778	1.432608
1.31184	1.43258
1.31592	1.432553
1.32	1.432525
1.3241	1.432497
1.32822	1.432469
1.33234	1.432441
1.33648	1.432414
1.34063	1.432386
1.34479	1.432358
1.34897	1.43233
1.35316	1.432302
1.35736	1.432275
1.36158	1.432247
1.36581	1.432219
1.37005	1.432191
1.37431	1.432163
1.37858	1.432135
1.38286	1.432108
1.38715	1.43208
1.39146	1.432052
1.39578	1.432024
1.40012	1.431996
1.40447	1.431968
1.40883	1.43194
1.41321	1.431912
1.4176	1.431884
1.422	1.431856
1.42642	1.431828
1.43085	1.4318
1.43529	1.431772
1.43975	1.431744
1.44422	1.431716
1.44871	1.431688
1.45321	1.43166
1.45772	1.431631
1.46225	1.431603
1.46679	1.431575
1.47135	1.431547
1.47592	1.431518
1.4805	1.43149
1.4851	1.431462
1.48971	1.431433
1.49434	1.431405
1.49898	1.431376
1.50364	1.431348
1.50831	1.431319
1.51299	1.431291
1.51769	1.431262
1.52241	1.431233
1.52714	1.431204
1.53188	1.431176
1.53664	1.431147
1.54141	1.431118
1.5462	1.431089
1.551	1.43106

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: —

C₅H₁₀(OH)₂ (Pentanediol): all datasets

Moutzouris et al. 2013: n 0.450–1.55 µm n 0.45–1.551 µm default

About C5H10(OH)2 (Pentanediol)

Pentanediol (C₅H₁₂O₂) is an organic compound primarily used in the industrial production of polymers and as a solvent in various chemical reactions. It belongs to the family of diols, which are alcohols with two hydroxyl (-OH) groups. Pentanediol can exist in multiple isomeric forms depending on the position of the hydroxyl groups in the molecule. In the realm of optics, it's relatively transparent in the visible range. Like other organic solvents, it's important to handle pentanediol with care, considering its potential reactivity and health effects. Safe storage and handling measures should be adhered to, especially when used in significant quantities. Isomers:1,5-Pentanediol - most common isomer; 2,4-Pentanediol; 1,2-Pentanediol. Chemical formula: 1,5-Pentanediol: HOCH₂CH₂CH₂CH₂CH₂OH

More about C5H10(OH)2 (Pentanediol) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C5H12O2 - pentanediol/nk/Moutzouris.yml
ID: ds_0ec69d50aa09
API: /v1/datasets/ds_0ec69d50aa09

Plot