Optical constants

Refractive index of C₇H₁₄O₂ (Enanthic acid)

Rubio et al. 2015: n 0.400–0.590 µm

Data: formula 5
Range: 0.4–0.59 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: 1.42291
Extinction coefficient k: 0

Permittivity ε₁: 2.02468
Permittivity ε₂: 0

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

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.0386767 µm⁻¹

Group index n_g: 1.44564
Group velocity dispersion: 70.9437 fs²/mm

Dispersion parameter D: -387.035 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

# C7H14O2 (Enanthic acid): Rubio et al. 2015: n 0.400–0.590 µm
c7h14o2 = ls.fetch_refractiveindex("organic", "enanthic_acid", "Rubio", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c7h14o2.range_nm)  # (400, 590) nm
eps = c7h14o2.eps([486])  # 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_e7f6c68c2d5a/lightsmith"
c7h14o2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c7h14o2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (enanthic-acid/rubio-2015).

# ... load c7h14o2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c7h14o2)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=590, 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 = 1.41155 + 0.00392342 λ^{- 2.0}

Valid from 0.4 to 0.59 µm.

Coefficients as stored

C_i	Value
C1	1.41155
C2	0.00392342
C3	-2.0

Comments and conditions

20 °C (293 K). For the temperature-dependent formula, refer to the original publication.

Conditions

temperature: 293 K

References

J. E. F. Rubio, J. M. Arsuaga, M. Taravillo, M. Cáceres. Refractive index temperature and wavelength dependencies of normal saturated fatty acids in liquid state. Exp. Therm. Fluid Sci. 29, 681-684 (2015)

doi:10.1016/j.expthermflusci.2004.11.002 Refractive index temperature and wavelength dependencies of normal saturated fatty acids in liquid state, Experimental Thermal and Fluid Science (2005)

Cite

José E.F. Rubio, Jesús M. Arsuaga, Mercedes Taravillo and Mercedes Cáceres. Refractive index temperature and wavelength dependencies of normal saturated fatty acids in liquid state. Experimental Thermal and Fluid Science, 29, 681-684 (2005), doi:10.1016/j.expthermflusci.2004.11.002; 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

C7H14O2 (Enanthic acid), Rubio et al. 2015: n 0.400–0.590 µm: n and k versus wavelength
λ (µm)	n
0.4	1.436071
0.40039	1.436024
0.40078	1.435976
0.401171	1.435928
0.401562	1.435881
0.401953	1.435834
0.402345	1.435786
0.402737	1.435739
0.403129	1.435692
0.403522	1.435645
0.403915	1.435598
0.404309	1.435551
0.404703	1.435505
0.405097	1.435458
0.405492	1.435412
0.405887	1.435365
0.406283	1.435319
0.406679	1.435273
0.407075	1.435226
0.407472	1.43518
0.407869	1.435134
0.408267	1.435088
0.408664	1.435043
0.409063	1.434997
0.409461	1.434951
0.40986	1.434906
0.41026	1.43486
0.41066	1.434815
0.41106	1.43477
0.41146	1.434724
0.411861	1.434679
0.412263	1.434634
0.412665	1.434589
0.413067	1.434545
0.413469	1.4345
0.413872	1.434455
0.414276	1.434411
0.414679	1.434366
0.415083	1.434322
0.415488	1.434277
0.415893	1.434233
0.416298	1.434189
0.416704	1.434145
0.41711	1.434101
0.417517	1.434057
0.417923	1.434013
0.418331	1.433969
0.418738	1.433926
0.419146	1.433882
0.419555	1.433839
0.419964	1.433795
0.420373	1.433752
0.420783	1.433709
0.421193	1.433666
0.421603	1.433623
0.422014	1.43358
0.422425	1.433537
0.422837	1.433494
0.423249	1.433451
0.423662	1.433409
0.424075	1.433366
0.424488	1.433324
0.424902	1.433281
0.425316	1.433239
0.42573	1.433197
0.426145	1.433155
0.42656	1.433113
0.426976	1.433071
0.427392	1.433029
0.427809	1.432987
0.428226	1.432945
0.428643	1.432904
0.429061	1.432862
0.429479	1.432821
0.429897	1.432779
0.430316	1.432738
0.430736	1.432697
0.431155	1.432656
0.431576	1.432614
0.431996	1.432573
0.432417	1.432533
0.432839	1.432492
0.43326	1.432451
0.433683	1.43241
0.434105	1.43237
0.434528	1.432329
0.434952	1.432289
0.435376	1.432248
0.4358	1.432208
0.436225	1.432168
0.43665	1.432128
0.437075	1.432088
0.437501	1.432048
0.437928	1.432008
0.438355	1.431968
0.438782	1.431928
0.439209	1.431889
0.439637	1.431849
0.440066	1.43181
0.440495	1.43177
0.440924	1.431731
0.441354	1.431691
0.441784	1.431652
0.442214	1.431613
0.442645	1.431574
0.443077	1.431535
0.443509	1.431496
0.443941	1.431457
0.444373	1.431419
0.444806	1.43138
0.44524	1.431341
0.445674	1.431303
0.446108	1.431264
0.446543	1.431226
0.446978	1.431188
0.447414	1.43115
0.44785	1.431111
0.448286	1.431073
0.448723	1.431035
0.44916	1.430997
0.449598	1.43096
0.450036	1.430922
0.450475	1.430884
0.450914	1.430846
0.451353	1.430809
0.451793	1.430771
0.452234	1.430734
0.452674	1.430697
0.453115	1.430659
0.453557	1.430622
0.453999	1.430585
0.454441	1.430548
0.454884	1.430511
0.455328	1.430474
0.455771	1.430437
0.456216	1.430401
0.45666	1.430364
0.457105	1.430327
0.457551	1.430291
0.457997	1.430254
0.458443	1.430218
0.45889	1.430182
0.459337	1.430145
0.459785	1.430109
0.460233	1.430073
0.460681	1.430037
0.46113	1.430001
0.46158	1.429965
0.462029	1.429929
0.46248	1.429893
0.46293	1.429858
0.463381	1.429822
0.463833	1.429786
0.464285	1.429751
0.464738	1.429716
0.46519	1.42968
0.465644	1.429645
0.466098	1.42961
0.466552	1.429575
0.467007	1.429539
0.467462	1.429504
0.467917	1.42947
0.468373	1.429435
0.46883	1.4294
0.469287	1.429365
0.469744	1.42933
0.470202	1.429296
0.47066	1.429261
0.471119	1.429227
0.471578	1.429192
0.472037	1.429158
0.472497	1.429124
0.472958	1.42909
0.473419	1.429055
0.47388	1.429021
0.474342	1.428987
0.474804	1.428953
0.475267	1.42892
0.47573	1.428886
0.476194	1.428852
0.476658	1.428818
0.477122	1.428785
0.477587	1.428751
0.478053	1.428718
0.478519	1.428684
0.478985	1.428651
0.479452	1.428618
0.479919	1.428584
0.480387	1.428551
0.480855	1.428518
0.481324	1.428485
0.481793	1.428452
0.482262	1.428419
0.482732	1.428387
0.483203	1.428354
0.483674	1.428321
0.484145	1.428288
0.484617	1.428256
0.485089	1.428223
0.485562	1.428191
0.486035	1.428158
0.486509	1.428126
0.486983	1.428094
0.487457	1.428062
0.487932	1.42803
0.488408	1.427997
0.488884	1.427965
0.48936	1.427934
0.489837	1.427902
0.490315	1.42787
0.490792	1.427838
0.491271	1.427806
0.49175	1.427775
0.492229	1.427743
0.492708	1.427712
0.493189	1.42768
0.493669	1.427649
0.49415	1.427617
0.494632	1.427586
0.495114	1.427555
0.495597	1.427524
0.49608	1.427493
0.496563	1.427462
0.497047	1.427431
0.497531	1.4274
0.498016	1.427369
0.498502	1.427338
0.498987	1.427307
0.499474	1.427277
0.49996	1.427246
0.500448	1.427216
0.500935	1.427185
0.501424	1.427155
0.501912	1.427124
0.502401	1.427094
0.502891	1.427064
0.503381	1.427034
0.503872	1.427003
0.504363	1.426973
0.504854	1.426943
0.505346	1.426913
0.505839	1.426883
0.506332	1.426854
0.506825	1.426824
0.507319	1.426794
0.507813	1.426764
0.508308	1.426735
0.508804	1.426705
0.5093	1.426676
0.509796	1.426646
0.510293	1.426617
0.51079	1.426588
0.511288	1.426558
0.511786	1.426529
0.512285	1.4265
0.512784	1.426471
0.513284	1.426442
0.513784	1.426413
0.514285	1.426384
0.514786	1.426355
0.515288	1.426326
0.51579	1.426298
0.516293	1.426269
0.516796	1.42624
0.517299	1.426212
0.517803	1.426183
0.518308	1.426155
0.518813	1.426126
0.519319	1.426098
0.519825	1.426069
0.520332	1.426041
0.520839	1.426013
0.521346	1.425985
0.521854	1.425957
0.522363	1.425929
0.522872	1.425901
0.523382	1.425873
0.523892	1.425845
0.524402	1.425817
0.524913	1.425789
0.525425	1.425762
0.525937	1.425734
0.526449	1.425706
0.526962	1.425679
0.527476	1.425651
0.52799	1.425624
0.528505	1.425596
0.52902	1.425569
0.529535	1.425542
0.530051	1.425515
0.530568	1.425487
0.531085	1.42546
0.531602	1.425433
0.532121	1.425406
0.532639	1.425379
0.533158	1.425352
0.533678	1.425325
0.534198	1.425299
0.534718	1.425272
0.53524	1.425245
0.535761	1.425219
0.536283	1.425192
0.536806	1.425165
0.537329	1.425139
0.537853	1.425112
0.538377	1.425086
0.538902	1.42506
0.539427	1.425033
0.539953	1.425007
0.540479	1.424981
0.541005	1.424955
0.541533	1.424929
0.54206	1.424903
0.542589	1.424877
0.543118	1.424851
0.543647	1.424825
0.544177	1.424799
0.544707	1.424773
0.545238	1.424748
0.545769	1.424722
0.546301	1.424696
0.546833	1.424671
0.547366	1.424645
0.5479	1.42462
0.548434	1.424594
0.548968	1.424569
0.549503	1.424543
0.550039	1.424518
0.550575	1.424493
0.551111	1.424468
0.551648	1.424443
0.552186	1.424417
0.552724	1.424392
0.553263	1.424367
0.553802	1.424343
0.554342	1.424318
0.554882	1.424293
0.555423	1.424268
0.555964	1.424243
0.556506	1.424219
0.557048	1.424194
0.557591	1.424169
0.558134	1.424145
0.558678	1.42412
0.559223	1.424096
0.559768	1.424071
0.560313	1.424047
0.560859	1.424023
0.561406	1.423998
0.561953	1.423974
0.562501	1.42395
0.563049	1.423926
0.563598	1.423902
0.564147	1.423878
0.564697	1.423854
0.565247	1.42383
0.565798	1.423806
0.566349	1.423782
0.566901	1.423758
0.567454	1.423734
0.568007	1.423711
0.56856	1.423687
0.569114	1.423663
0.569669	1.42364
0.570224	1.423616
0.57078	1.423593
0.571336	1.423569
0.571893	1.423546
0.57245	1.423523
0.573008	1.423499
0.573567	1.423476
0.574126	1.423453
0.574685	1.42343
0.575245	1.423407
0.575806	1.423383
0.576367	1.42336
0.576929	1.423337
0.577491	1.423315
0.578054	1.423292
0.578617	1.423269
0.579181	1.423246
0.579745	1.423223
0.58031	1.4232
0.580876	1.423178
0.581442	1.423155
0.582009	1.423133
0.582576	1.42311
0.583144	1.423088
0.583712	1.423065
0.584281	1.423043
0.58485	1.42302
0.58542	1.422998
0.585991	1.422976
0.586562	1.422953
0.587133	1.422931
0.587706	1.422909
0.588278	1.422887
0.588852	1.422865
0.589426	1.422843
0.59	1.422821

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: —

C₇H₁₄O₂ (Enanthic acid): all datasets

Rubio et al. 2015: n 0.400–0.590 µm n 0.4–0.59 µm default

About C7H14O2 (Enanthic acid)

Enanthic acid is a saturated fatty acid with a seven-carbon chain. It is a colorless oily liquid with an unpleasant, rancid odor. Naturally occurring in some plant oils, it is used in the synthesis of esters for fragrances and flavors. Industrially, enanthic acid serves as an intermediate in the production of lubricants and plasticizers. Chemical formula: CH₃(CH₂)₅COOH

More about C7H14O2 (Enanthic acid) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C7H14O2 - enanthic acid/nk/Rubio.yml
ID: ds_e7f6c68c2d5a
API: /v1/datasets/ds_e7f6c68c2d5a

Plot