Optical constants

Refractive index of C₆H₁₂ (Cyclohexane)

Kozma et al. 2005: n 0.230–0.641 µm

Data: formula 2
Range: 0.23–0.6407 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: 1.42539
Extinction coefficient k: 0

Permittivity ε₁: 2.03174
Permittivity ε₂: 0

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

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.0389245 µm⁻¹

Group index n_g: 1.44826
Group velocity dispersion: 74.2959 fs²/mm

Dispersion parameter D: -405.323 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

# C6H12 (Cyclohexane): Kozma et al. 2005: n 0.230–0.641 µm
c6h12 = ls.fetch_refractiveindex("organic", "cyclohexane", "Kozma", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c6h12.range_nm)  # (230, 640.7) nm
eps = c6h12.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_d84a47b5dbac/lightsmith"
c6h12 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c6h12.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (cyclohexane/kozma-2005).

# ... load c6h12 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c6h12)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=640, 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_d84a47b5dbac/lightsmith?model=drude_lorentz"
c6h12_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 (C in µm²) (formula 2), λ in µm

n^{2} - 1 = \frac{0.98901 λ^{2}}{λ^{2} - 0.01023416369} + \frac{0.01121 λ^{2}}{λ^{2} - 0.03623317709}

Valid from 0.23 to 0.6407 µm.

Coefficients as stored

C_i	Value
C1	0.0
C2	0.98901
C3	0.01023416369
C4	0.01121
C5	0.03623317709

Comments and conditions

22 °C

Conditions

temperature: 295 K

References

I. Z. Kozma, P. Krok, E. Riedle. Direct measurement of the group-velocity mismatch and derivation of the refractive-index dispersion for a variety of solvents in the ultraviolet. J. Opt. Soc. Am. B 22, 1479-1485 (2005)

doi:10.1364/josab.22.001479 Direct measurement of the group-velocity mismatch and derivation of the refractive-index dispersion for a variety of solvents in the ultraviolet, Journal of the Optical Society of America B (2005)

Cite

Ida Z. Kozma, Patrizia Krok and Eberhard Riedle. Direct measurement of the group-velocity mismatch and derivation of the refractive-index dispersion for a variety of solvents in the ultraviolet. Journal of the Optical Society of America B, 22, 1479 (2005), doi:10.1364/josab.22.001479; 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

C6H12 (Cyclohexane), Kozma et al. 2005: n 0.230–0.641 µm: n and k versus wavelength
λ (µm)	n
0.23	1.503935
0.230591	1.503305
0.231184	1.502681
0.231779	1.502064
0.232374	1.501454
0.232972	1.500851
0.233571	1.500253
0.234171	1.499662
0.234773	1.499078
0.235377	1.498499
0.235982	1.497926
0.236589	1.497358
0.237197	1.496797
0.237807	1.496241
0.238418	1.49569
0.239031	1.495145
0.239646	1.494605
0.240262	1.49407
0.240879	1.49354
0.241499	1.493015
0.24212	1.492495
0.242742	1.491979
0.243366	1.491469
0.243992	1.490963
0.244619	1.490461
0.245248	1.489965
0.245879	1.489472
0.246511	1.488984
0.247144	1.4885
0.24778	1.48802
0.248417	1.487545
0.249055	1.487073
0.249696	1.486606
0.250338	1.486142
0.250981	1.485683
0.251627	1.485227
0.252273	1.484775
0.252922	1.484327
0.253572	1.483882
0.254224	1.483441
0.254878	1.483004
0.255533	1.482571
0.25619	1.48214
0.256849	1.481714
0.257509	1.48129
0.258171	1.480871
0.258835	1.480454
0.2595	1.480041
0.260167	1.479631
0.260836	1.479224
0.261507	1.47882
0.262179	1.47842
0.262853	1.478022
0.263529	1.477628
0.264207	1.477237
0.264886	1.476849
0.265567	1.476463
0.26625	1.476081
0.266934	1.475701
0.26762	1.475325
0.268308	1.474951
0.268998	1.47458
0.26969	1.474211
0.270383	1.473846
0.271078	1.473483
0.271775	1.473123
0.272474	1.472766
0.273174	1.472411
0.273877	1.472058
0.274581	1.471709
0.275287	1.471362
0.275994	1.471017
0.276704	1.470675
0.277415	1.470335
0.278129	1.469998
0.278844	1.469663
0.279561	1.469331
0.280279	1.469001
0.281	1.468673
0.281722	1.468348
0.282447	1.468025
0.283173	1.467704
0.283901	1.467385
0.284631	1.467069
0.285362	1.466755
0.286096	1.466443
0.286832	1.466133
0.287569	1.465826
0.288308	1.46552
0.289049	1.465217
0.289793	1.464916
0.290538	1.464617
0.291285	1.46432
0.292033	1.464025
0.292784	1.463732
0.293537	1.46344
0.294292	1.463151
0.295048	1.462864
0.295807	1.462579
0.296567	1.462296
0.29733	1.462015
0.298094	1.461735
0.298861	1.461458
0.299629	1.461182
0.300399	1.460908
0.301171	1.460636
0.301946	1.460366
0.302722	1.460098
0.3035	1.459831
0.304281	1.459567
0.305063	1.459303
0.305847	1.459042
0.306633	1.458783
0.307422	1.458525
0.308212	1.458269
0.309005	1.458014
0.309799	1.457761
0.310595	1.45751
0.311394	1.457261
0.312195	1.457013
0.312997	1.456766
0.313802	1.456522
0.314609	1.456279
0.315417	1.456037
0.316228	1.455797
0.317041	1.455559
0.317856	1.455322
0.318674	1.455087
0.319493	1.454853
0.320314	1.454621
0.321138	1.45439
0.321963	1.45416
0.322791	1.453933
0.323621	1.453706
0.324453	1.453481
0.325287	1.453258
0.326124	1.453036
0.326962	1.452815
0.327803	1.452596
0.328645	1.452378
0.32949	1.452161
0.330337	1.451946
0.331187	1.451732
0.332038	1.45152
0.332892	1.451309
0.333748	1.451099
0.334606	1.45089
0.335466	1.450683
0.336328	1.450477
0.337193	1.450273
0.33806	1.450069
0.338929	1.449867
0.3398	1.449666
0.340674	1.449467
0.34155	1.449269
0.342428	1.449072
0.343308	1.448876
0.344191	1.448681
0.345076	1.448488
0.345963	1.448295
0.346852	1.448104
0.347744	1.447914
0.348638	1.447726
0.349534	1.447538
0.350433	1.447352
0.351334	1.447167
0.352237	1.446982
0.353143	1.446799
0.354051	1.446618
0.354961	1.446437
0.355874	1.446257
0.356788	1.446079
0.357706	1.445901
0.358625	1.445725
0.359547	1.445549
0.360472	1.445375
0.361398	1.445202
0.362328	1.44503
0.363259	1.444859
0.364193	1.444689
0.365129	1.44452
0.366068	1.444352
0.367009	1.444185
0.367953	1.444019
0.368899	1.443854
0.369847	1.44369
0.370798	1.443526
0.371751	1.443364
0.372707	1.443203
0.373665	1.443043
0.374626	1.442884
0.375589	1.442726
0.376555	1.442569
0.377523	1.442412
0.378493	1.442257
0.379466	1.442102
0.380442	1.441949
0.38142	1.441796
0.382401	1.441645
0.383384	1.441494
0.384369	1.441344
0.385358	1.441195
0.386348	1.441047
0.387342	1.440899
0.388337	1.440753
0.389336	1.440607
0.390337	1.440463
0.39134	1.440319
0.392346	1.440176
0.393355	1.440034
0.394366	1.439892
0.39538	1.439752
0.396397	1.439612
0.397416	1.439473
0.398438	1.439335
0.399462	1.439198
0.400489	1.439062
0.401519	1.438926
0.402551	1.438791
0.403586	1.438657
0.404623	1.438524
0.405664	1.438392
0.406707	1.43826
0.407752	1.438129
0.4088	1.437999
0.409851	1.437869
0.410905	1.437741
0.411962	1.437613
0.413021	1.437486
0.414083	1.437359
0.415147	1.437233
0.416214	1.437109
0.417284	1.436984
0.418357	1.436861
0.419433	1.436738
0.420511	1.436616
0.421592	1.436494
0.422676	1.436374
0.423763	1.436254
0.424852	1.436134
0.425945	1.436016
0.42704	1.435898
0.428137	1.435781
0.429238	1.435664
0.430342	1.435548
0.431448	1.435433
0.432557	1.435318
0.433669	1.435204
0.434784	1.435091
0.435902	1.434978
0.437023	1.434866
0.438146	1.434755
0.439273	1.434644
0.440402	1.434534
0.441534	1.434425
0.44267	1.434316
0.443808	1.434208
0.444949	1.4341
0.446092	1.433993
0.447239	1.433887
0.448389	1.433781
0.449542	1.433676
0.450698	1.433571
0.451856	1.433467
0.453018	1.433364
0.454183	1.433261
0.45535	1.433159
0.456521	1.433057
0.457695	1.432956
0.458871	1.432856
0.460051	1.432756
0.461234	1.432656
0.46242	1.432558
0.463609	1.432459
0.464801	1.432362
0.465995	1.432264
0.467194	1.432168
0.468395	1.432072
0.469599	1.431976
0.470806	1.431881
0.472017	1.431787
0.47323	1.431693
0.474447	1.4316
0.475666	1.431507
0.476889	1.431415
0.478115	1.431323
0.479345	1.431231
0.480577	1.431141
0.481813	1.43105
0.483051	1.430961
0.484293	1.430871
0.485538	1.430783
0.486786	1.430694
0.488038	1.430607
0.489293	1.430519
0.490551	1.430432
0.491812	1.430346
0.493076	1.43026
0.494344	1.430175
0.495615	1.43009
0.496889	1.430006
0.498166	1.429922
0.499447	1.429838
0.500731	1.429755
0.502019	1.429673
0.503309	1.429591
0.504603	1.429509
0.5059	1.429428
0.507201	1.429347
0.508505	1.429267
0.509812	1.429187
0.511123	1.429108
0.512437	1.429029
0.513755	1.42895
0.515075	1.428872
0.5164	1.428794
0.517727	1.428717
0.519058	1.42864
0.520393	1.428564
0.521731	1.428488
0.523072	1.428413
0.524417	1.428338
0.525765	1.428263
0.527117	1.428189
0.528472	1.428115
0.529831	1.428041
0.531193	1.427968
0.532558	1.427895
0.533927	1.427823
0.5353	1.427751
0.536676	1.42768
0.538056	1.427609
0.539439	1.427538
0.540826	1.427468
0.542217	1.427398
0.543611	1.427328
0.545008	1.427259
0.546409	1.427191
0.547814	1.427122
0.549223	1.427054
0.550635	1.426987
0.55205	1.426919
0.55347	1.426852
0.554892	1.426786
0.556319	1.42672
0.557749	1.426654
0.559183	1.426588
0.560621	1.426523
0.562062	1.426459
0.563507	1.426394
0.564956	1.42633
0.566408	1.426267
0.567865	1.426203
0.569325	1.42614
0.570788	1.426078
0.572256	1.426015
0.573727	1.425953
0.575202	1.425892
0.576681	1.425831
0.578163	1.42577
0.57965	1.425709
0.58114	1.425649
0.582634	1.425589
0.584132	1.425529
0.585634	1.42547
0.587139	1.425411
0.588649	1.425352
0.590162	1.425294
0.591679	1.425236
0.593201	1.425178
0.594726	1.425121
0.596255	1.425064
0.597788	1.425007
0.599324	1.42495
0.600865	1.424894
0.60241	1.424838
0.603959	1.424783
0.605512	1.424727
0.607068	1.424672
0.608629	1.424618
0.610194	1.424563
0.611762	1.424509
0.613335	1.424456
0.614912	1.424402
0.616493	1.424349
0.618078	1.424296
0.619667	1.424243
0.62126	1.424191
0.622857	1.424139
0.624459	1.424087
0.626064	1.424036
0.627674	1.423984
0.629287	1.423934
0.630905	1.423883
0.632527	1.423832
0.634153	1.423782
0.635784	1.423732
0.637418	1.423683
0.639057	1.423634
0.6407	1.423585

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: —

C₆H₁₂ (Cyclohexane): all datasets

About C6H12 (Cyclohexane)

Hexane (C₆H₁₄) is an alkane hydrocarbon with a straight chain of six carbon atoms. It appears as a colorless liquid that has a mild, gasoline-like odor. Volatile and highly flammable, hexane is often utilized as a solvent in laboratories due to its capability to dissolve non-polar substances. In the industrial realm, hexane is frequently used in the extraction of vegetable oils from crops such as soybeans. Its low polarity makes it ineffective for dissolving polar compounds but efficient for non-polar molecules. In optics, hexane can serve as a medium in certain experimental setups, benefiting from its defined refractive properties.

More about C6H12 (Cyclohexane) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C6H12 - cyclohexane/nk/Kozma.yml
ID: ds_d84a47b5dbac
API: /v1/datasets/ds_d84a47b5dbac

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