At one wavelength

Refractive index n: 3.69168
Extinction coefficient k: 0.188791

Permittivity ε₁: 13.5929
Permittivity ε₂: 1.39391

Absorption coefficient α: 40374.6 cm⁻¹
Penetration depth δ = λ/(2πk): 495.36 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: -1.4886 µm⁻¹

Group index n_g: 4.56638
Group velocity dispersion: — fs²/mm

Dispersion parameter D: — 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

# AlAs-GaAs (Aluminium gallium arsenide, AlGaAs): Adachi 1989: n,k 0.207–12.4 µm; 31.5% Al
alas_gaas = ls.fetch_refractiveindex("other", "AlAs-GaAs", "Adachi-0.315", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(alas_gaas.range_nm)  # (206.64, 12398) nm
eps = alas_gaas.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_d52d46305568/lightsmith"
alas_gaas = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(alas_gaas.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (alas-gaas/adachi-1989-0-315).

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

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.

Comments and conditions

Al_xGa_1-xAs; x=0.315

References

S. Adachi. Optical dispersion relations for GaP, GaAs, GaSb, InP, InAs, InSb, Al_xGa_1−xAs, and In_1−xGa_xAs_yP_1−y. J. Appl. Phys. 66, 6030-6040 (1989)
[Calculation script (Python)]

doi:10.1063/1.343580 Optical dispersion relations for GaP, GaAs, GaSb, InP, InAs, InSb, Al x Ga1− x As, and In1− x Ga x As y P1− y, Journal of Applied Physics (1989)

Cite

Sadao Adachi. Optical dispersion relations for GaP, GaAs, GaSb, InP, InAs, InSb, Al x Ga1− x As, and In1− x Ga x As y P1− y. Journal of Applied Physics, 66, 6030-6040 (1989), doi:10.1063/1.343580; [Calculation script (Python)]; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

200 rows as published

CSV comma separated TXT tab separated YAML n, k Full database record original YAML All quantities CSV JSON metadata

AlAs-GaAs (Aluminium gallium arsenide, AlGaAs), Adachi 1989: n,k 0.207–12.4 µm; 31.5% Al: n and k versus wavelength
λ (µm)	n	k
0.20664	1.3796	2.4794
0.20767	1.3889	2.4981
0.2087	1.3984	2.5174
0.20975	1.4081	2.5372
0.21081	1.4182	2.5577
0.21188	1.4287	2.5788
0.21295	1.4395	2.6006
0.21404	1.4507	2.6231
0.21515	1.4623	2.6464
0.21626	1.4745	2.6706
0.21738	1.4871	2.6956
0.21852	1.5004	2.7215
0.21967	1.5143	2.7484
0.22083	1.529	2.7763
0.222	1.5444	2.8054
0.22318	1.5608	2.8356
0.22438	1.5781	2.867
0.22559	1.5966	2.8997
0.22681	1.6164	2.9338
0.22805	1.6376	2.9694
0.2293	1.6604	3.0065
0.23057	1.6851	3.0451
0.23184	1.7118	3.0855
0.23314	1.7409	3.1275
0.23444	1.7727	3.1713
0.23577	1.8076	3.2169
0.2371	1.846	3.2642
0.23845	1.8883	3.3132
0.23982	1.9353	3.3639
0.2412	1.9874	3.4159
0.2426	2.0455	3.469
0.24402	2.1102	3.5227
0.24545	2.1825	3.5764
0.2469	2.2632	3.6292
0.24837	2.3531	3.6799
0.24985	2.4531	3.727
0.25135	2.5637	3.7685
0.25287	2.6852	3.8019
0.25441	2.817	3.8247
0.25597	2.9582	3.8337
0.25755	3.1065	3.8258
0.25914	3.2586	3.7985
0.26076	3.4101	3.7498
0.26239	3.556	3.6794
0.26405	3.6908	3.5886
0.26573	3.8098	3.4803
0.26743	3.9091	3.3591
0.26915	3.9871	3.2303
0.27089	4.0435	3.0993
0.27266	4.0797	2.9709
0.27445	4.0983	2.8487
0.27626	4.1023	2.7355
0.2781	4.0949	2.6327
0.27996	4.0791	2.541
0.28185	4.0575	2.4604
0.28376	4.0324	2.3902
0.2857	4.0054	2.3299
0.28766	3.9781	2.2784
0.28966	3.9513	2.2348
0.29168	3.926	2.1983
0.29372	3.9026	2.168
0.2958	3.8816	2.143
0.29791	3.8632	2.1227
0.30005	3.8476	2.1064
0.30222	3.8349	2.0936
0.30442	3.8252	2.0837
0.30665	3.8184	2.0764
0.30891	3.8146	2.0712
0.31121	3.8137	2.0678
0.31354	3.8157	2.0659
0.31591	3.8206	2.0653
0.31832	3.8283	2.0658
0.32076	3.8389	2.067
0.32324	3.8522	2.069
0.32576	3.8684	2.0715
0.32831	3.8874	2.0743
0.33091	3.9093	2.0774
0.33355	3.934	2.0805
0.33623	3.9616	2.0837
0.33896	3.9922	2.0867
0.34173	4.0259	2.0896
0.34454	4.0629	2.092
0.34741	4.1031	2.0941
0.35032	4.1469	2.0956
0.35328	4.1944	2.0964
0.35629	4.246	2.0964
0.35935	4.3018	2.0956
0.36246	4.3622	2.0936
0.36563	4.4276	2.0905
0.36886	4.4984	2.0861
0.37214	4.575	2.0804
0.37548	4.6576	2.0732
0.37888	4.7458	2.0649
0.38235	4.8386	2.0561
0.38588	4.9324	2.0482
0.38947	5.02	2.0442
0.39313	5.0897	2.0486
0.39686	5.1195	2.0426
0.40066	4.9909	1.7203
0.40454	4.8861	1.5262
0.40849	4.7801	1.3696
0.41252	4.6758	1.2291
0.41663	4.5766	1.0957
0.42082	4.4841	0.9646
0.4251	4.3988	0.83332
0.42947	4.3212	0.70026
0.43392	4.251	0.56443
0.43847	4.1898	0.4371
0.44312	4.1468	0.43171
0.44786	4.1071	0.42587
0.45271	4.0705	0.41963
0.45767	4.0367	0.413
0.46273	4.0054	0.40601
0.46791	3.9764	0.39867
0.4732	3.9494	0.391
0.47862	3.9245	0.38302
0.48416	3.9013	0.37472
0.48983	3.8799	0.36613
0.49564	3.86	0.35723
0.50158	3.8417	0.34802
0.50767	3.8247	0.3385
0.51391	3.8092	0.32864
0.5203	3.7949	0.31842
0.52686	3.7819	0.3078
0.53358	3.7701	0.29671
0.54048	3.7594	0.28507
0.54756	3.7499	0.27273
0.55482	3.7416	0.25944
0.56228	3.7342	0.24471
0.56994	3.7279	0.22723
0.57782	3.7137	0.19886
0.58591	3.6942	0.19057
0.59424	3.6818	0.1818
0.60281	3.672	0.17274
0.61162	3.6639	0.16334
0.6207	3.6573	0.15345
0.63005	3.652	0.14286
0.63969	3.6478	0.13118
0.64963	3.6448	0.11758
0.65988	3.6428	0.099692
0.67046	3.6418	0.072402
0.68138	3.6045	0.022987
0.69267	3.5675	0.022592
0.70433	3.5424	0.022131
0.7164	3.5217	0.021653
0.72889	3.5035	0.021169
0.74182	3.4871	0.020685
0.75521	3.472	0.020203
0.7691	3.4579	0.019725
0.78351	3.4447	0.019251
0.79847	3.4323	0.018783
0.81402	3.4205	0.01832
0.83018	3.4092	0.017862
0.84699	3.3986	0.017411
0.8645	3.3883	0.016965
0.88275	3.3786	0.016525
0.90179	3.3692	0.01609
0.92166	3.3602	0.015661
0.94243	3.3516	0.015238
0.96416	3.3433	0.01482
0.98691	3.3354	0.014408
1.0108	3.3277	0.014001
1.0358	3.3204	0.013599
1.0621	3.3133	0.013201
1.0898	3.3065	0.012809
1.119	3.3	0.012421
1.1497	3.2937	0.012038
1.1822	3.2876	0.011659
1.2166	3.2818	0.011284
1.2531	3.2762	0.010913
1.2918	3.2708	0.010546
1.3329	3.2656	0.010183
1.3768	3.2607	0.0098239
1.4237	3.2559	0.009468
1.4739	3.2514	0.0091155
1.5277	3.247	0.0087662
1.5857	3.2428	0.0084201
1.6482	3.2388	0.0080769
1.7158	3.235	0.0077366
1.7892	3.2314	0.0073989
1.8692	3.2279	0.0070639
1.9566	3.2246	0.0067314
2.0527	3.2215	0.0064012
2.1586	3.2185	0.0060732
2.2761	3.2157	0.0057474
2.4071	3.2131	0.0054235
2.5541	3.2106	0.0051016
2.7203	3.2083	0.0047813
2.9095	3.2061	0.0044628
3.1271	3.2041	0.0041457
3.3798	3.2022	0.0038301
3.677	3.2005	0.0035158
4.0315	3.1989	0.0032027
4.4616	3.1975	0.0028907
4.9945	3.1962	0.0025797
5.6719	3.1951	0.0022696
6.5619	3.1941	0.0019602
7.7832	3.1933	0.0016516
9.5631	3.1926	0.0013434
12.398	3.192	0.0010358

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: —

Plot