Optical constants

Refractive index of As₂S₃ (Arsenic trisulfide)

Rodney et al. 1958: n 0.57–11.8 µm

Data: formula 2
Range: 0.57–11.8 µm
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 2.65017
Extinction coefficient k: 0

Permittivity ε₁: 7.0234
Permittivity ε₂: 0

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

Abbe number V_d: —
Chromatic dispersion dn/dλ: -1.16586 µm⁻¹

Group index n_g: 3.33523
Group velocity dispersion: 3702.47 fs²/mm

Dispersion parameter D: -20198.9 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

# As2S3 (Arsenic trisulfide): Rodney et al. 1958: n 0.57–11.8 µm
as2s3 = ls.fetch_refractiveindex("main", "As2S3", "Rodney", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(as2s3.range_nm)  # (570, 11800) nm
eps = as2s3.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_f79461819a9c/lightsmith"
as2s3 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(as2s3.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (as2s3/rodney-1958).

# ... load as2s3 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=as2s3)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=570, 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_f79461819a9c/lightsmith?model=drude_lorentz"
as2s3_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{1.8983678 λ^{2}}{λ^{2} - 0.0225} + \frac{1.9222979 λ^{2}}{λ^{2} - 0.0625} + \frac{0.8765134 λ^{2}}{λ^{2} - 0.1225} + \frac{0.1188704 λ^{2}}{λ^{2} - 0.2025} + \frac{0.9569903 λ^{2}}{λ^{2} - 750.0}

Valid from 0.57 to 11.8 µm.

Coefficients as stored

C_i	Value
C1	0.0
C2	1.8983678
C3	0.0225
C4	1.9222979
C5	0.0625
C6	0.8765134
C7	0.1225
C8	0.1188704
C9	0.2025
C10	0.9569903
C11	750.0

Comments and conditions

Arsenic trisulfide glass. 25 °C

References

W. S. Rodney, I. H. Malitson, T. A. King. Refractive index of arsenic trisulfide. J. Opt. Soc. Am. 48, 633-635 (1958)

doi:10.1364/josa.48.000633 Refractive Index of Arsenic Trisulfide, Journal of the Optical Society of America (1958)

Cite

William S. Rodney, Irving H. Malitson and Thomas A. King. Refractive Index of Arsenic Trisulfide. Journal of the Optical Society of America, 48, 633 (1958), doi:10.1364/josa.48.000633; 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

As2S3 (Arsenic trisulfide), Rodney et al. 1958: n 0.57–11.8 µm: n and k versus wavelength
λ (µm)	n
0.57	2.672434
0.574345	2.66659
0.578724	2.660941
0.583136	2.655479
0.587581	2.650191
0.592061	2.645069
0.596574	2.640104
0.601122	2.635289
0.605705	2.630616
0.610322	2.626078
0.614975	2.62167
0.619663	2.617385
0.624387	2.613219
0.629147	2.609165
0.633943	2.605221
0.638776	2.60138
0.643646	2.597639
0.648553	2.593994
0.653497	2.590442
0.658479	2.586979
0.663499	2.583601
0.668557	2.580307
0.673654	2.577092
0.678789	2.573954
0.683964	2.57089
0.689178	2.567899
0.694432	2.564977
0.699726	2.562122
0.70506	2.559332
0.710435	2.556606
0.715851	2.553941
0.721308	2.551335
0.726807	2.548786
0.732348	2.546294
0.737931	2.543855
0.743557	2.541469
0.749225	2.539135
0.754937	2.53685
0.760692	2.534613
0.766491	2.532423
0.772334	2.530278
0.778222	2.528178
0.784155	2.526122
0.790133	2.524107
0.796157	2.522133
0.802226	2.520199
0.808342	2.518304
0.814504	2.516447
0.820713	2.514627
0.82697	2.512843
0.833274	2.511094
0.839627	2.509379
0.846028	2.507697
0.852477	2.506048
0.858976	2.504431
0.865524	2.502845
0.872123	2.50129
0.878771	2.499764
0.885471	2.498266
0.892221	2.496797
0.899023	2.495356
0.905876	2.493942
0.912782	2.492553
0.919741	2.491191
0.926752	2.489854
0.933817	2.488542
0.940936	2.487253
0.94811	2.485988
0.955337	2.484746
0.96262	2.483527
0.969959	2.48233
0.977353	2.481154
0.984804	2.48
0.992312	2.478866
0.999876	2.477752
1.0075	2.476658
1.01518	2.475584
1.02292	2.474528
1.03072	2.473492
1.03857	2.472473
1.04649	2.471472
1.05447	2.470489
1.06251	2.469523
1.07061	2.468573
1.07877	2.46764
1.08699	2.466723
1.09528	2.465822
1.10363	2.464937
1.11204	2.464066
1.12052	2.463211
1.12906	2.46237
1.13767	2.461543
1.14634	2.46073
1.15508	2.459931
1.16389	2.459146
1.17276	2.458374
1.1817	2.457614
1.19071	2.456868
1.19979	2.456134
1.20893	2.455412
1.21815	2.454702
1.22744	2.454004
1.2368	2.453317
1.24622	2.452642
1.25572	2.451978
1.2653	2.451324
1.27494	2.450682
1.28466	2.45005
1.29446	2.449428
1.30432	2.448817
1.31427	2.448215
1.32429	2.447623
1.33438	2.447041
1.34456	2.446468
1.35481	2.445904
1.36513	2.445349
1.37554	2.444803
1.38603	2.444266
1.39659	2.443738
1.40724	2.443218
1.41797	2.442706
1.42878	2.442202
1.43967	2.441706
1.45065	2.441218
1.4617	2.440738
1.47285	2.440265
1.48408	2.4398
1.49539	2.439342
1.50679	2.438891
1.51828	2.438447
1.52985	2.43801
1.54151	2.43758
1.55327	2.437156
1.56511	2.436739
1.57704	2.436328
1.58906	2.435924
1.60117	2.435526
1.61338	2.435133
1.62568	2.434747
1.63807	2.434367
1.65056	2.433992
1.66314	2.433623
1.67582	2.43326
1.6886	2.432902
1.70147	2.432549
1.71444	2.432202
1.72751	2.431859
1.74068	2.431522
1.75395	2.43119
1.76732	2.430863
1.7808	2.43054
1.79437	2.430222
1.80805	2.429909
1.82184	2.4296
1.83572	2.429296
1.84972	2.428996
1.86382	2.428701
1.87803	2.42841
1.89235	2.428123
1.90677	2.42784
1.92131	2.42756
1.93596	2.427285
1.95071	2.427014
1.96558	2.426747
1.98057	2.426483
1.99567	2.426223
2.01088	2.425966
2.02621	2.425713
2.04166	2.425464
2.05722	2.425217
2.07291	2.424974
2.08871	2.424735
2.10463	2.424498
2.12068	2.424265
2.13684	2.424035
2.15313	2.423808
2.16955	2.423584
2.18609	2.423362
2.20275	2.423144
2.21955	2.422928
2.23647	2.422715
2.25352	2.422505
2.2707	2.422297
2.28801	2.422092
2.30545	2.42189
2.32302	2.42169
2.34073	2.421492
2.35858	2.421297
2.37656	2.421104
2.39468	2.420913
2.41293	2.420725
2.43133	2.420538
2.44986	2.420354
2.46854	2.420172
2.48736	2.419992
2.50632	2.419814
2.52543	2.419638
2.54468	2.419464
2.56408	2.419292
2.58362	2.419122
2.60332	2.418953
2.62317	2.418786
2.64316	2.418621
2.66331	2.418458
2.68362	2.418296
2.70408	2.418136
2.72469	2.417977
2.74546	2.41782
2.76639	2.417664
2.78748	2.41751
2.80873	2.417357
2.83014	2.417205
2.85172	2.417055
2.87346	2.416906
2.89536	2.416758
2.91744	2.416612
2.93968	2.416466
2.96209	2.416322
2.98467	2.416179
3.00742	2.416037
3.03035	2.415896
3.05345	2.415756
3.07673	2.415617
3.10019	2.415479
3.12382	2.415342
3.14763	2.415205
3.17163	2.41507
3.19581	2.414935
3.22017	2.414801
3.24472	2.414668
3.26946	2.414535
3.29438	2.414403
3.31949	2.414272
3.3448	2.414141
3.3703	2.414011
3.39599	2.413882
3.42188	2.413752
3.44797	2.413624
3.47425	2.413496
3.50074	2.413368
3.52743	2.413241
3.55432	2.413114
3.58141	2.412987
3.60872	2.41286
3.63623	2.412734
3.66395	2.412608
3.69188	2.412483
3.72003	2.412357
3.74839	2.412231
3.77696	2.412106
3.80575	2.411981
3.83477	2.411855
3.864	2.41173
3.89346	2.411605
3.92314	2.41148
3.95305	2.411354
3.98318	2.411229
4.01355	2.411103
4.04415	2.410977
4.07498	2.410851
4.10604	2.410724
4.13734	2.410598
4.16888	2.410471
4.20067	2.410343
4.23269	2.410216
4.26496	2.410088
4.29747	2.409959
4.33023	2.40983
4.36324	2.409701
4.39651	2.409571
4.43002	2.40944
4.4638	2.409309
4.49782	2.409177
4.53211	2.409044
4.56666	2.408911
4.60148	2.408777
4.63656	2.408642
4.6719	2.408507
4.70752	2.40837
4.74341	2.408233
4.77957	2.408094
4.816	2.407955
4.85272	2.407815
4.88971	2.407674
4.92699	2.407531
4.96455	2.407388
5.0024	2.407243
5.04053	2.407098
5.07896	2.406951
5.11768	2.406802
5.15669	2.406653
5.196	2.406502
5.23562	2.406349
5.27553	2.406196
5.31575	2.40604
5.35627	2.405884
5.3971	2.405725
5.43825	2.405565
5.47971	2.405404
5.52148	2.405241
5.56357	2.405076
5.60599	2.404909
5.64873	2.40474
5.69179	2.40457
5.73518	2.404397
5.7789	2.404223
5.82296	2.404046
5.86735	2.403868
5.91208	2.403687
5.95715	2.403504
6.00256	2.403319
6.04832	2.403132
6.09443	2.402942
6.14089	2.40275
6.18771	2.402555
6.23488	2.402358
6.28241	2.402158
6.3303	2.401956
6.37856	2.401751
6.42719	2.401543
6.47618	2.401332
6.52555	2.401118
6.5753	2.400902
6.62543	2.400682
6.67594	2.400459
6.72683	2.400233
6.77811	2.400004
6.82979	2.399772
6.88185	2.399536
6.93431	2.399296
6.98718	2.399053
7.04044	2.398807
7.09412	2.398556
7.1482	2.398302
7.20269	2.398044
7.2576	2.397782
7.31293	2.397516
7.36868	2.397246
7.42485	2.396972
7.48146	2.396693
7.53849	2.39641
7.59596	2.396122
7.65387	2.395829
7.71222	2.395532
7.77101	2.39523
7.83025	2.394923
7.88995	2.394611
7.95009	2.394294
8.0107	2.393971
8.07177	2.393643
8.13331	2.39331
8.19531	2.392971
8.25779	2.392626
8.32074	2.392275
8.38417	2.391918
8.44809	2.391555
8.51249	2.391185
8.57739	2.390809
8.64277	2.390426
8.70866	2.390037
8.77505	2.38964
8.84195	2.389237
8.90935	2.388826
8.97727	2.388408
9.04571	2.387982
9.11467	2.387548
9.18416	2.387106
9.25417	2.386656
9.32472	2.386198
9.39581	2.385731
9.46744	2.385255
9.53961	2.384771
9.61233	2.384277
9.68561	2.383773
9.75945	2.38326
9.83385	2.382737
9.90882	2.382204
9.98436	2.38166
10.0605	2.381106
10.1372	2.380541
10.2145	2.379964
10.2923	2.379376
10.3708	2.378776
10.4498	2.378164
10.5295	2.37754
10.6098	2.376903
10.6907	2.376252
10.7722	2.375589
10.8543	2.374911
10.937	2.374219
11.0204	2.373513
11.1044	2.372792
11.1891	2.372055
11.2744	2.371302
11.3603	2.370534
11.4469	2.369748
11.5342	2.368946
11.6221	2.368126
11.7107	2.367287
11.8	2.36643

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: —

As₂S₃ (Arsenic trisulfide): all datasets

Experimental data - crystal

Experimental data - glass

Rodney et al. 1958: n 0.57–11.8 µm n 0.57–11.8 µm

Models and simulations - crystal

About As2S3 (Arsenic trisulfide)

As₂S₃, also known as arsenic trisulfide, exists in both crystalline and amorphous forms. The crystalline form is commonly referred to as orpiment and occurs naturally as a mineral. However, in optical and photonic applications, the amorphous or glassy form of As₂S₃ is often preferred. This chalcogenide glass features a broad transmission window that extends from the visible to the mid-infrared spectral regions, and it is known for its high nonlinear optical coefficients. The amorphous structure allows for the material to be easily molded, drawn into fibers, or deposited as thin films, making it highly versatile for a variety of optoelectronic applications. It also offers the advantage of strong light confinement due to its high refractive index. However, users should exercise caution as the material contains toxic arsenic, and its photosensitive nature necessitates consideration for stability under light exposure. Whether in its crystalline or amorphous state, As₂S₃ remains a material of significant interest for both its unique optical properties and its potential in emerging technologies. Mineral: Orpiment

More about As2S3 (Arsenic trisulfide) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/main/As2S3/nk/Rodney.yml
ID: ds_f79461819a9c
API: /v1/datasets/ds_f79461819a9c

Plot