At one wavelength

Refractive index n: 3.42449
Extinction coefficient k: 0.0203128

Permittivity ε₁: 11.7267
Permittivity ε₂: 0.139122

Absorption coefficient α: 4344.09 cm⁻¹
Penetration depth δ = λ/(2πk): 4603.96 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: -2.01681 µm⁻¹

Group index n_g: 4.60957
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; 70.0% Al
alas_gaas = ls.fetch_refractiveindex("other", "AlAs-GaAs", "Adachi-0.700", 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_2cbe4ed2c4ca/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-1989-0-700).

# ... 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=0.700

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; 70.0% Al: n and k versus wavelength
λ (µm)	n	k
0.20664	1.5789	2.5067
0.20767	1.5882	2.5208
0.2087	1.5976	2.5352
0.20975	1.6072	2.5502
0.21081	1.617	2.5656
0.21188	1.627	2.5816
0.21295	1.6371	2.5981
0.21404	1.6475	2.6153
0.21515	1.6581	2.6331
0.21626	1.6689	2.6517
0.21738	1.68	2.671
0.21852	1.6915	2.6911
0.21967	1.7032	2.7121
0.22083	1.7154	2.734
0.222	1.728	2.757
0.22318	1.7411	2.7811
0.22438	1.7548	2.8064
0.22559	1.7691	2.833
0.22681	1.7841	2.8611
0.22805	1.8	2.8906
0.2293	1.8168	2.9219
0.23057	1.8348	2.9549
0.23184	1.8542	2.9899
0.23314	1.8751	3.0271
0.23444	1.8978	3.0666
0.23577	1.9228	3.1085
0.2371	1.9503	3.1531
0.23845	1.9809	3.2006
0.23982	2.0151	3.2511
0.2412	2.0538	3.3047
0.2426	2.0978	3.3615
0.24402	2.148	3.4214
0.24545	2.2059	3.4843
0.2469	2.2728	3.5497
0.24837	2.3505	3.6168
0.24985	2.4408	3.6842
0.25135	2.5458	3.7499
0.25287	2.6674	3.811
0.25441	2.807	3.8632
0.25597	2.9651	3.9012
0.25755	3.1401	3.9185
0.25914	3.3281	3.9082
0.26076	3.5217	3.8646
0.26239	3.7105	3.7844
0.26405	3.8827	3.6691
0.26573	4.0277	3.5252
0.26743	4.1385	3.3632
0.26915	4.213	3.1949
0.27089	4.2541	3.0309
0.27266	4.2675	2.8791
0.27445	4.2601	2.7437
0.27626	4.2385	2.6266
0.2781	4.2084	2.5274
0.27996	4.174	2.4448
0.28185	4.1386	2.3767
0.28376	4.1044	2.3213
0.2857	4.0727	2.2765
0.28766	4.0446	2.2405
0.28966	4.0205	2.2119
0.29168	4.0007	2.1892
0.29372	3.9852	2.1714
0.2958	3.9742	2.1576
0.29791	3.9674	2.1469
0.30005	3.9649	2.1388
0.30222	3.9664	2.1328
0.30442	3.972	2.1283
0.30665	3.9813	2.125
0.30891	3.9945	2.1225
0.31121	4.0113	2.1207
0.31354	4.0318	2.1193
0.31591	4.0559	2.118
0.31832	4.0837	2.1167
0.32076	4.1151	2.1153
0.32324	4.1504	2.1135
0.32576	4.1895	2.1112
0.32831	4.2326	2.1083
0.33091	4.28	2.1047
0.33355	4.3318	2.1001
0.33623	4.3882	2.0946
0.33896	4.4495	2.0879
0.34173	4.5159	2.0802
0.34454	4.5872	2.0714
0.34741	4.6629	2.0618
0.35032	4.7414	2.0523
0.35328	4.8193	2.0442
0.35629	4.8901	2.0402
0.35935	4.9446	2.0438
0.36246	4.9191	1.9203
0.36563	4.8163	1.6603
0.36886	4.7289	1.4929
0.37214	4.6408	1.3567
0.37548	4.5541	1.235
0.37888	4.4712	1.1202
0.38235	4.3936	1.0083
0.38588	4.3219	0.89703
0.38947	4.2562	0.78497
0.39313	4.1966	0.67125
0.39686	4.1432	0.55524
0.40066	4.1023	0.49316
0.40454	4.0719	0.48802
0.40849	4.0444	0.48206
0.41252	4.0195	0.47524
0.41663	3.997	0.46748
0.42082	3.9768	0.45872
0.4251	3.9587	0.44885
0.42947	3.9426	0.43771
0.43392	3.9282	0.42509
0.43847	3.9156	0.41065
0.44312	3.9045	0.39379
0.44786	3.8948	0.37325
0.45271	3.8861	0.34391
0.45767	3.8497	0.31703
0.46273	3.8284	0.3065
0.46791	3.8122	0.29444
0.4732	3.7991	0.28084
0.47862	3.7882	0.26547
0.48416	3.7791	0.24795
0.48983	3.7716	0.22767
0.49564	3.7656	0.20355
0.50158	3.7609	0.17345
0.50767	3.7574	0.13125
0.51391	3.7089	0.050464
0.5203	3.6496	0.047041
0.52686	3.6111	0.043442
0.53358	3.5797	0.039893
0.54048	3.5523	0.036464
0.54756	3.5276	0.033201
0.55482	3.5049	0.03014
0.56228	3.4838	0.027316
0.56994	3.4641	0.024764
0.57782	3.4455	0.022519
0.58591	3.4279	0.02062
0.59424	3.4111	0.019106
0.60281	3.3951	0.01802
0.61162	3.3798	0.017406
0.6207	3.3652	0.017002
0.63005	3.3512	0.016605
0.63969	3.3377	0.016216
0.64963	3.3247	0.015835
0.65988	3.3122	0.01546
0.67046	3.3001	0.015093
0.68138	3.2885	0.014733
0.69267	3.2773	0.01438
0.70433	3.2664	0.014033
0.7164	3.2559	0.013692
0.72889	3.2458	0.013358
0.74182	3.236	0.01303
0.75521	3.2265	0.012708
0.7691	3.2174	0.012391
0.78351	3.2085	0.01208
0.79847	3.1999	0.011775
0.81402	3.1915	0.011474
0.83018	3.1835	0.011179
0.84699	3.1757	0.010888
0.8645	3.1681	0.010602
0.88275	3.1608	0.010321
0.90179	3.1537	0.010044
0.92166	3.1468	0.0097711
0.94243	3.1401	0.0095025
0.96416	3.1337	0.0092378
0.98691	3.1274	0.0089769
1.0108	3.1214	0.0087197
1.0358	3.1155	0.0084661
1.0621	3.1099	0.0082159
1.0898	3.1044	0.007969
1.119	3.0991	0.0077254
1.1497	3.094	0.0074848
1.1822	3.0891	0.0072471
1.2166	3.0843	0.0070123
1.2531	3.0798	0.0067803
1.2918	3.0753	0.0065509
1.3329	3.0711	0.006324
1.3768	3.067	0.0060996
1.4237	3.063	0.0058775
1.4739	3.0592	0.0056577
1.5277	3.0556	0.00544
1.5857	3.0521	0.0052243
1.6482	3.0487	0.0050106
1.7158	3.0455	0.0047988
1.7892	3.0425	0.0045887
1.8692	3.0395	0.0043804
1.9566	3.0368	0.0041737
2.0527	3.0341	0.0039685
2.1586	3.0316	0.0037648
2.2761	3.0292	0.0035624
2.4071	3.027	0.0033614
2.5541	3.0249	0.0031616
2.7203	3.0229	0.0029629
2.9095	3.0211	0.0027653
3.1271	3.0193	0.0025686
3.3798	3.0178	0.0023729
3.677	3.0163	0.0021781
4.0315	3.0149	0.001984
4.4616	3.0137	0.0017907
4.9945	3.0126	0.0015979
5.6719	3.0117	0.0014058
6.5619	3.0108	0.0012141
7.7832	3.0101	0.0010229
9.5631	3.0095	0.00083205
12.398	3.0091	0.00064148

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