Optical constants

Refractive index of C₈H₁₇OH (Octanol)

Chang et al. 2024: n 0.4–2.0 µm

Data: formula 1
Range: 0.4–2 µm
Temperature: 295 K
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.4285
Extinction coefficient k: 0

Permittivity ε₁: 2.0406
Permittivity ε₂: 0

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

Abbe number V_d: 63.007
Chromatic dispersion dn/dλ: -0.0349743 µm⁻¹

Group index n_g: 1.44905
Group velocity dispersion: 64.6559 fs²/mm

Dispersion parameter D: -352.732 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

# C8H17OH (Octanol): Chang et al. 2024: n 0.4–2.0 µm
c8h17oh = ls.fetch_refractiveindex("organic", "octanol", "Chang", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c8h17oh.range_nm)  # (400, 2000) nm
eps = c8h17oh.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_78e81abe5ee8/lightsmith"
c8h17oh = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c8h17oh.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (octanol/chang-2024).

# ... load c8h17oh as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c8h17oh)],
    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"]).

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_78e81abe5ee8/lightsmith?model=drude_lorentz"
c8h17oh_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 (formula 1), λ in µm

n^{2} - 1 = \frac{1.013 λ^{2}}{λ^{2} - {0.0965}^{2}} + \frac{0.0112 λ^{2}}{λ^{2} - {2.9}^{2}}

Valid from 0.4 to 2.0 µm.

Coefficients as stored

C_i	Value
C1	0.0
C2	1.013
C3	0.0965
C4	0.0112
C5	2.9

Comments and conditions

1-Octanol. 21.5–22.0 °C.

Conditions

temperature: 295 K

References

H.-J. Chang, N. Munera, C. Lopez-Zelaya, D. Banerjee, G. Beadie, E. W. Van Stryland, D. J. Hagan. Refractive index measurements of liquids from 0.5 to 2 µm using Rayleigh interferometry. Opt. Mater. Express 14, 1253–1267 (2024)

doi:10.1364/ome.519907 Refractive index measurements of liquids from 0.5 to 2 µm using Rayleigh interferometry, Optical Materials Express (2024)

Cite

Hao-Jung Chang et al.. Refractive index measurements of liquids from 0.5 to 2 µm using Rayleigh interferometry. Optical Materials Express, 14, 1253 (2024), doi:10.1364/ome.519907; 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

C8H17OH (Octanol), Chang et al. 2024: n 0.4–2.0 µm: n and k versus wavelength
λ (µm)	n
0.4	1.440619
0.401617	1.440434
0.40324	1.440249
0.40487	1.440067
0.406506	1.439886
0.408149	1.439706
0.409799	1.439528
0.411455	1.439352
0.413118	1.439177
0.414788	1.439004
0.416465	1.438832
0.418148	1.438662
0.419838	1.438493
0.421535	1.438326
0.423239	1.43816
0.424949	1.437996
0.426667	1.437833
0.428391	1.437672
0.430123	1.437512
0.431861	1.437353
0.433607	1.437196
0.435359	1.43704
0.437119	1.436885
0.438886	1.436732
0.44066	1.43658
0.442441	1.436429
0.444229	1.43628
0.446024	1.436132
0.447827	1.435985
0.449637	1.43584
0.451455	1.435696
0.453279	1.435553
0.455111	1.435411
0.456951	1.435271
0.458798	1.435131
0.460652	1.434993
0.462514	1.434856
0.464383	1.43472
0.46626	1.434586
0.468145	1.434452
0.470037	1.43432
0.471937	1.434189
0.473844	1.434059
0.47576	1.43393
0.477683	1.433802
0.479613	1.433675
0.481552	1.433549
0.483498	1.433425
0.485452	1.433301
0.487414	1.433179
0.489385	1.433057
0.491363	1.432937
0.493349	1.432817
0.495343	1.432699
0.497345	1.432582
0.499355	1.432465
0.501373	1.43235
0.5034	1.432235
0.505434	1.432122
0.507477	1.432009
0.509528	1.431897
0.511588	1.431787
0.513655	1.431677
0.515732	1.431568
0.517816	1.43146
0.519909	1.431353
0.52201	1.431247
0.52412	1.431142
0.526239	1.431037
0.528366	1.430934
0.530501	1.430831
0.532645	1.43073
0.534798	1.430629
0.53696	1.430529
0.53913	1.430429
0.541309	1.430331
0.543497	1.430233
0.545694	1.430136
0.547899	1.43004
0.550114	1.429945
0.552337	1.429851
0.55457	1.429757
0.556811	1.429664
0.559062	1.429572
0.561321	1.429481
0.56359	1.42939
0.565868	1.4293
0.568155	1.429211
0.570452	1.429123
0.572757	1.429035
0.575072	1.428948
0.577397	1.428862
0.57973	1.428776
0.582073	1.428691
0.584426	1.428607
0.586788	1.428524
0.58916	1.428441
0.591541	1.428359
0.593932	1.428277
0.596333	1.428197
0.598743	1.428117
0.601163	1.428037
0.603593	1.427958
0.606032	1.42788
0.608482	1.427802
0.610941	1.427725
0.613411	1.427649
0.61589	1.427573
0.618379	1.427498
0.620879	1.427424
0.623388	1.42735
0.625908	1.427277
0.628438	1.427204
0.630978	1.427132
0.633528	1.42706
0.636088	1.426989
0.638659	1.426919
0.641241	1.426849
0.643833	1.426779
0.646435	1.426711
0.649048	1.426642
0.651671	1.426575
0.654305	1.426508
0.656949	1.426441
0.659605	1.426375
0.662271	1.426309
0.664948	1.426244
0.667635	1.42618
0.670334	1.426116
0.673043	1.426052
0.675763	1.425989
0.678495	1.425926
0.681237	1.425864
0.68399	1.425803
0.686755	1.425742
0.689531	1.425681
0.692318	1.425621
0.695116	1.425561
0.697925	1.425502
0.700746	1.425443
0.703579	1.425385
0.706422	1.425327
0.709278	1.425269
0.712144	1.425212
0.715023	1.425156
0.717913	1.425099
0.720814	1.425044
0.723728	1.424988
0.726653	1.424934
0.72959	1.424879
0.732539	1.424825
0.7355	1.424771
0.738472	1.424718
0.741457	1.424665
0.744454	1.424613
0.747463	1.424561
0.750484	1.424509
0.753517	1.424458
0.756563	1.424407
0.759621	1.424356
0.762691	1.424306
0.765774	1.424257
0.768869	1.424207
0.771977	1.424158
0.775097	1.424109
0.77823	1.424061
0.781375	1.424013
0.784533	1.423965
0.787704	1.423918
0.790888	1.423871
0.794085	1.423825
0.797294	1.423778
0.800517	1.423732
0.803752	1.423687
0.807001	1.423641
0.810263	1.423596
0.813538	1.423552
0.816826	1.423507
0.820127	1.423463
0.823442	1.42342
0.82677	1.423376
0.830112	1.423333
0.833467	1.42329
0.836836	1.423248
0.840218	1.423206
0.843614	1.423164
0.847024	1.423122
0.850447	1.423081
0.853885	1.42304
0.857336	1.422999
0.860801	1.422958
0.86428	1.422918
0.867774	1.422878
0.871281	1.422839
0.874803	1.422799
0.878338	1.42276
0.881888	1.422721
0.885453	1.422682
0.889032	1.422644
0.892625	1.422606
0.896233	1.422568
0.899855	1.42253
0.903492	1.422493
0.907144	1.422456
0.910811	1.422419
0.914492	1.422382
0.918188	1.422345
0.921899	1.422309
0.925626	1.422273
0.929367	1.422237
0.933123	1.422202
0.936895	1.422166
0.940681	1.422131
0.944483	1.422096
0.948301	1.422061
0.952134	1.422027
0.955982	1.421993
0.959846	1.421958
0.963726	1.421924
0.967621	1.421891
0.971532	1.421857
0.975458	1.421824
0.979401	1.421791
0.98336	1.421758
0.987334	1.421725
0.991325	1.421692
0.995332	1.42166
0.999355	1.421628
1.00339	1.421596
1.00745	1.421564
1.01152	1.421532
1.01561	1.4215
1.01971	1.421469
1.02384	1.421438
1.02797	1.421407
1.03213	1.421376
1.0363	1.421345
1.04049	1.421314
1.04469	1.421284
1.04892	1.421253
1.05316	1.421223
1.05741	1.421193
1.06169	1.421163
1.06598	1.421134
1.07029	1.421104
1.07461	1.421074
1.07896	1.421045
1.08332	1.421016
1.0877	1.420987
1.09209	1.420958
1.09651	1.420929
1.10094	1.4209
1.10539	1.420871
1.10986	1.420843
1.11434	1.420815
1.11885	1.420786
1.12337	1.420758
1.12791	1.42073
1.13247	1.420702
1.13704	1.420674
1.14164	1.420646
1.14625	1.420619
1.15089	1.420591
1.15554	1.420563
1.16021	1.420536
1.1649	1.420509
1.16961	1.420481
1.17433	1.420454
1.17908	1.420427
1.18385	1.4204
1.18863	1.420373
1.19344	1.420346
1.19826	1.420319
1.2031	1.420293
1.20797	1.420266
1.21285	1.420239
1.21775	1.420213
1.22267	1.420186
1.22761	1.42016
1.23258	1.420133
1.23756	1.420107
1.24256	1.42008
1.24758	1.420054
1.25262	1.420028
1.25769	1.420002
1.26277	1.419975
1.26787	1.419949
1.273	1.419923
1.27814	1.419897
1.28331	1.419871
1.2885	1.419845
1.2937	1.419819
1.29893	1.419793
1.30418	1.419767
1.30945	1.419741
1.31475	1.419715
1.32006	1.419688
1.3254	1.419662
1.33075	1.419636
1.33613	1.41961
1.34153	1.419584
1.34696	1.419558
1.3524	1.419532
1.35787	1.419506
1.36335	1.41948
1.36886	1.419454
1.3744	1.419427
1.37995	1.419401
1.38553	1.419375
1.39113	1.419349
1.39675	1.419322
1.4024	1.419296
1.40807	1.419269
1.41376	1.419243
1.41947	1.419216
1.42521	1.41919
1.43097	1.419163
1.43675	1.419136
1.44256	1.419109
1.44839	1.419082
1.45424	1.419055
1.46012	1.419028
1.46602	1.419001
1.47195	1.418974
1.4779	1.418946
1.48387	1.418919
1.48987	1.418891
1.49589	1.418863
1.50194	1.418835
1.50801	1.418807
1.5141	1.418779
1.52022	1.418751
1.52637	1.418723
1.53254	1.418694
1.53873	1.418665
1.54495	1.418636
1.55119	1.418607
1.55746	1.418578
1.56376	1.418549
1.57008	1.418519
1.57643	1.41849
1.5828	1.41846
1.58919	1.418429
1.59562	1.418399
1.60207	1.418369
1.60854	1.418338
1.61504	1.418307
1.62157	1.418276
1.62813	1.418244
1.63471	1.418212
1.64131	1.41818
1.64795	1.418148
1.65461	1.418116
1.6613	1.418083
1.66801	1.41805
1.67475	1.418016
1.68152	1.417983
1.68832	1.417949
1.69514	1.417914
1.70199	1.417879
1.70887	1.417844
1.71578	1.417809
1.72271	1.417773
1.72968	1.417737
1.73667	1.417701
1.74369	1.417664
1.75074	1.417626
1.75781	1.417589
1.76492	1.41755
1.77205	1.417512
1.77921	1.417472
1.7864	1.417433
1.79362	1.417393
1.80087	1.417352
1.80815	1.417311
1.81546	1.417269
1.8228	1.417227
1.83017	1.417184
1.83756	1.417141
1.84499	1.417097
1.85245	1.417052
1.85993	1.417007
1.86745	1.416961
1.875	1.416914
1.88258	1.416867
1.89019	1.416819
1.89783	1.41677
1.9055	1.41672
1.9132	1.41667
1.92093	1.416618
1.9287	1.416566
1.93649	1.416513
1.94432	1.416459
1.95218	1.416404
1.96007	1.416348
1.96799	1.416291
1.97594	1.416233
1.98393	1.416174
1.99195	1.416114
2	1.416053

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: —

C₈H₁₇OH (Octanol): all datasets

Chang et al. 2024: n 0.4–2.0 µm n 0.4–2 µm default

About C8H17OH (Octanol)

Octanol (C₈H₁₈O) is an organic compound that consists of an eight-carbon chain terminating in a hydroxyl group (-OH). It typically presents as a colorless, oily liquid with a faintly floral or citrus-like odor. Octanol is principally used as a solvent and in the manufacture of esters used in perfumes and flavorings. It also plays a role in the production of plasticizers and surfactants. In optical applications, the specific refractive index properties of octanol may prove advantageous for certain specialized uses. While octanol is less toxic compared to many organic solvents, it can still pose risks to health if improperly handled, necessitating measures for safe usage and storage.

More about C8H17OH (Octanol) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C8H18O - octanol/nk/Chang.yml
ID: ds_78e81abe5ee8
API: /v1/datasets/ds_78e81abe5ee8

Plot