Optical constants

Refractive index of AgGaS₂ (Silver gallium sulfide, AGS)

Kato and Shirahata 1996: n(e) 0.54–12.9 µm

Data: formula 4
Range: 0.54–12.9 µm
Temperature: 294 K
Optical axis: e
Licence: CC0-1.0

Uniaxial crystal, axes: oe

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 2.53625
Extinction coefficient k: 0

Permittivity ε₁: 6.43255
Permittivity ε₂: 0

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

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.83736 µm⁻¹

Group index n_g: 3.02828
Group velocity dispersion: 2249.04 fs²/mm

Dispersion parameter D: -12269.7 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

# AgGaS2 (Silver gallium sulfide, AGS): Kato and Shirahata 1996: n(e) 0.54–12.9 µm
aggas2 = ls.fetch_refractiveindex("main", "AgGaS2", "Kato-e", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(aggas2.range_nm)  # (540, 12900) nm
eps = aggas2.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_54882f508c11/lightsmith"
aggas2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(aggas2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (aggas2/kato-shirahata-1996-e).

# ... load aggas2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=aggas2)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=540, 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.

Dispersion formula

RefractiveIndex.INFO (formula 4), λ in µm

n^{2} = 5.5412 + \frac{0.22041 λ^{0.0}}{λ^{2} - {0.09824}^{1.0}} - 0.002524 λ^{2.0} + 3.6214 \times 10^{-7} λ^{4.0} - 8.3605 \times 10^{-9} λ^{6.0}

Valid from 0.54 to 12.9 µm.

Coefficients as stored

C_i	Value
C1	5.5412
C2	0.22041
C3	0.0
C4	0.09824
C5	1.0
C6	0.0
C7	0.0
C8	0.0
C9	1.0
C10	-0.002524
C11	2.0
C12	3.6214e-07
C13	4.0
C14	-8.3605e-09
C15	6.0

Comments and conditions

Extraordinary ray (e); 20.0 °C

Conditions

temperature: 294 K
direction: e

References

1) K. Kato and H. Shirahata. Nonlinear IR generation in AgGaS₂. Jpn. J. Appl. Phys., 35, 4645-4648 (1996)
2) A. Harasaki and K. Kato. New data on the nonlinear optical constant, phase-matching, and optical damage of AgGaS₂. Jpn. J. Appl. Phys., 36, 700-703 (1997)

doi:10.1143/jjap.35.4645 Nonlinear IR Generation in AgGaS2, Japanese Journal of Applied Physics (1996)
doi:10.1143/jjap.36.700 New Data on the Nonlinear Optical Constant, Phase-Matching, and Optical Damage of AgGaS 2, Japanese Journal of Applied Physics (1997)

Cite

Kiyoshi Kato Kiyoshi Kato and Hiromichi Shirahata Hiromichi Shirahata. Nonlinear IR Generation in AgGaS2. Japanese Journal of Applied Physics, 35, 4645 (1996), doi:10.1143/jjap.35.4645; Akiko Harasaki Akiko Harasaki and Kiyoshi Kato Kiyoshi Kato. New Data on the Nonlinear Optical Constant, Phase-Matching, and Optical Damage of AgGaS 2. Japanese Journal of Applied Physics, 36, 700 (1997), doi:10.1143/jjap.36.700; 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

AgGaS2 (Silver gallium sulfide, AGS), Kato and Shirahata 1996: n(e) 0.54–12.9 µm: n and k versus wavelength
λ (µm)	n
0.54	2.584639
0.544312	2.579425
0.548658	2.574364
0.553039	2.569449
0.557456	2.564675
0.561907	2.560036
0.566394	2.555528
0.570917	2.551144
0.575475	2.546882
0.580071	2.542735
0.584703	2.538701
0.589372	2.534775
0.594078	2.530952
0.598822	2.527231
0.603603	2.523606
0.608423	2.520075
0.613281	2.516635
0.618178	2.513282
0.623115	2.510014
0.62809	2.506828
0.633106	2.503721
0.638161	2.50069
0.643257	2.497734
0.648393	2.494849
0.653571	2.492034
0.65879	2.489287
0.66405	2.486604
0.669353	2.483986
0.674698	2.481428
0.680085	2.47893
0.685516	2.47649
0.69099	2.474107
0.696507	2.471777
0.702069	2.469501
0.707675	2.467276
0.713326	2.465101
0.719022	2.462975
0.724764	2.460895
0.730551	2.458862
0.736385	2.456873
0.742265	2.454928
0.748192	2.453025
0.754166	2.451162
0.760188	2.44934
0.766258	2.447557
0.772377	2.445812
0.778545	2.444103
0.784761	2.442431
0.791028	2.440793
0.797344	2.43919
0.803711	2.43762
0.810129	2.436082
0.816598	2.434576
0.823119	2.4331
0.829691	2.431655
0.836316	2.430239
0.842995	2.428851
0.849726	2.427492
0.856511	2.426159
0.863351	2.424853
0.870244	2.423573
0.877193	2.422318
0.884198	2.421088
0.891258	2.419882
0.898375	2.4187
0.905549	2.41754
0.91278	2.416403
0.920068	2.415288
0.927415	2.414194
0.934821	2.413122
0.942286	2.412069
0.94981	2.411037
0.957394	2.410024
0.965039	2.409031
0.972745	2.408056
0.980513	2.407099
0.988342	2.40616
0.996234	2.405238
1.00419	2.404334
1.01221	2.403446
1.02029	2.402575
1.02844	2.40172
1.03665	2.40088
1.04493	2.400056
1.05327	2.399246
1.06168	2.398451
1.07016	2.397671
1.0787	2.396904
1.08732	2.396152
1.096	2.395412
1.10475	2.394686
1.11357	2.393973
1.12247	2.393272
1.13143	2.392584
1.14046	2.391908
1.14957	2.391244
1.15875	2.390591
1.168	2.389949
1.17733	2.389319
1.18673	2.3887
1.19621	2.388091
1.20576	2.387493
1.21539	2.386905
1.22509	2.386327
1.23487	2.385759
1.24474	2.3852
1.25467	2.384651
1.26469	2.384111
1.27479	2.38358
1.28497	2.383058
1.29523	2.382545
1.30557	2.38204
1.316	2.381544
1.32651	2.381056
1.3371	2.380576
1.34778	2.380103
1.35854	2.379639
1.36939	2.379181
1.38032	2.378732
1.39134	2.378289
1.40245	2.377854
1.41365	2.377425
1.42494	2.377004
1.43632	2.376589
1.44779	2.376181
1.45935	2.375779
1.471	2.375383
1.48275	2.374994
1.49459	2.37461
1.50652	2.374233
1.51855	2.373861
1.53068	2.373495
1.5429	2.373134
1.55522	2.372779
1.56764	2.37243
1.58016	2.372085
1.59278	2.371746
1.60549	2.371412
1.61831	2.371082
1.63124	2.370758
1.64426	2.370438
1.65739	2.370123
1.67063	2.369812
1.68397	2.369506
1.69741	2.369205
1.71097	2.368907
1.72463	2.368614
1.7384	2.368324
1.75228	2.368039
1.76628	2.367758
1.78038	2.36748
1.7946	2.367206
1.80893	2.366936
1.82337	2.36667
1.83793	2.366407
1.85261	2.366147
1.8674	2.365891
1.88231	2.365638
1.89734	2.365388
1.91249	2.365142
1.92776	2.364898
1.94316	2.364658
1.95867	2.36442
1.97431	2.364186
1.99008	2.363954
2.00597	2.363725
2.02199	2.363498
2.03813	2.363274
2.05441	2.363053
2.07081	2.362834
2.08735	2.362618
2.10402	2.362404
2.12082	2.362192
2.13775	2.361983
2.15482	2.361775
2.17203	2.36157
2.18937	2.361367
2.20686	2.361166
2.22448	2.360967
2.24224	2.360769
2.26014	2.360574
2.27819	2.36038
2.29638	2.360188
2.31472	2.359998
2.3332	2.35981
2.35184	2.359623
2.37062	2.359437
2.38954	2.359253
2.40863	2.359071
2.42786	2.358889
2.44725	2.35871
2.46679	2.358531
2.48648	2.358354
2.50634	2.358178
2.52635	2.358003
2.54653	2.357829
2.56686	2.357656
2.58736	2.357484
2.60802	2.357313
2.62884	2.357143
2.64983	2.356974
2.67099	2.356806
2.69232	2.356639
2.71382	2.356472
2.73549	2.356306
2.75733	2.35614
2.77935	2.355976
2.80155	2.355811
2.82392	2.355648
2.84647	2.355484
2.86919	2.355321
2.89211	2.355159
2.9152	2.354997
2.93848	2.354835
2.96194	2.354673
2.98559	2.354512
3.00943	2.354351
3.03346	2.35419
3.05769	2.354029
3.0821	2.353868
3.10671	2.353707
3.13152	2.353546
3.15653	2.353385
3.18173	2.353224
3.20714	2.353063
3.23275	2.352901
3.25856	2.352739
3.28458	2.352577
3.31081	2.352415
3.33725	2.352252
3.3639	2.352089
3.39076	2.351925
3.41783	2.351761
3.44512	2.351596
3.47263	2.351431
3.50036	2.351265
3.52831	2.351099
3.55649	2.350931
3.58489	2.350763
3.61351	2.350594
3.64237	2.350425
3.67145	2.350254
3.70077	2.350083
3.73032	2.34991
3.76011	2.349737
3.79013	2.349562
3.8204	2.349386
3.8509	2.349209
3.88165	2.349031
3.91265	2.348852
3.94389	2.348671
3.97538	2.34849
4.00713	2.348306
4.03913	2.348121
4.07138	2.347935
4.10389	2.347747
4.13666	2.347558
4.16969	2.347367
4.20299	2.347174
4.23655	2.34698
4.27038	2.346784
4.30448	2.346586
4.33885	2.346386
4.3735	2.346184
4.40842	2.34598
4.44362	2.345774
4.4791	2.345566
4.51487	2.345356
4.55092	2.345144
4.58726	2.344929
4.62389	2.344712
4.66081	2.344493
4.69803	2.344272
4.73554	2.344047
4.77336	2.343821
4.81147	2.343591
4.84989	2.343359
4.88862	2.343125
4.92766	2.342887
4.96701	2.342647
5.00667	2.342404
5.04665	2.342157
5.08695	2.341908
5.12757	2.341656
5.16851	2.3414
5.20978	2.341142
5.25138	2.340879
5.29331	2.340614
5.33558	2.340345
5.37819	2.340073
5.42113	2.339797
5.46442	2.339517
5.50806	2.339234
5.55204	2.338946
5.59637	2.338655
5.64106	2.33836
5.6861	2.338061
5.73151	2.337758
5.77728	2.33745
5.82341	2.337138
5.86991	2.336822
5.91678	2.336501
5.96403	2.336176
6.01165	2.335846
6.05965	2.335511
6.10804	2.335172
6.15681	2.334827
6.20598	2.334478
6.25553	2.334123
6.30548	2.333764
6.35583	2.333398
6.40659	2.333028
6.45774	2.332652
6.50931	2.33227
6.56129	2.331883
6.61368	2.331489
6.66649	2.33109
6.71972	2.330684
6.77338	2.330273
6.82747	2.329855
6.88199	2.329431
6.93694	2.329
6.99233	2.328562
7.04817	2.328117
7.10445	2.327666
7.16118	2.327207
7.21836	2.326742
7.276	2.326268
7.3341	2.325788
7.39266	2.325299
7.4517	2.324803
7.5112	2.324299
7.57118	2.323787
7.63163	2.323266
7.69257	2.322737
7.754	2.322199
7.81591	2.321653
7.87833	2.321097
7.94124	2.320533
8.00465	2.319959
8.06857	2.319375
8.13299	2.318782
8.19794	2.318179
8.2634	2.317566
8.32938	2.316942
8.39589	2.316308
8.46294	2.315663
8.53051	2.315007
8.59863	2.31434
8.66729	2.313661
8.7365	2.312971
8.80626	2.312269
8.87658	2.311554
8.94746	2.310827
9.01891	2.310088
9.09093	2.309335
9.16352	2.308569
9.23669	2.307789
9.31045	2.306996
9.38479	2.306188
9.45973	2.305366
9.53527	2.304528
9.61141	2.303676
9.68816	2.302808
9.76552	2.301924
9.8435	2.301024
9.9221	2.300107
10.0013	2.299173
10.0812	2.298221
10.1617	2.297252
10.2428	2.296264
10.3246	2.295257
10.4071	2.294231
10.4902	2.293185
10.5739	2.292119
10.6584	2.291033
10.7435	2.289924
10.8293	2.288795
10.9157	2.287642
11.0029	2.286467
11.0908	2.285268
11.1793	2.284044
11.2686	2.282796
11.3586	2.281522
11.4493	2.280222
11.5407	2.278895
11.6328	2.27754
11.7257	2.276156
11.8194	2.274743
11.9137	2.2733
12.0089	2.271826
12.1048	2.270319
12.2014	2.26878
12.2989	2.267206
12.3971	2.265598
12.4961	2.263953
12.5958	2.262271
12.6964	2.260551
12.7978	2.258791
12.9	2.256991

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: —

AgGaS₂ (Silver gallium sulfide, AGS): all datasets

About AgGaS2 (Silver gallium sulfide, AGS)

AgGaS₂, commonly abbreviated as AGS, is a ternary chalcogenide compound that has gained considerable attention for its nonlinear optical properties. This material crystallizes in a tetragonal structure and possesses a wide transparency range, extending from the visible to the mid-infrared spectrum. AGS is particularly renowned for its high nonlinear optical coefficients, which make it an attractive material for frequency conversion processes like second-harmonic generation (SHG) and difference-frequency generation (DFG). Due to these attributes, AGS has been utilized in a range of optoelectronic applications, including optical parametric oscillators and tunable infrared lasers. Its nonlinear optical performance is highly anisotropic, meaning that the material's properties can vary depending on the crystallographic orientation, a factor that must be considered in device design and fabrication. Like many chalcogenides, AGS is sensitive to thermal and mechanical stress, requiring careful handling and environmental control. Overall, AgGaS₂ serves as a critical material in the realm of nonlinear optics, offering a unique combination of wide transparency and high nonlinear coefficients that continue to make it a subject of ongoing research and technological development.

More about AgGaS2 (Silver gallium sulfide, AGS) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/main/AgGaS2/nk/Kato-e.yml
ID: ds_54882f508c11
API: /v1/datasets/ds_54882f508c11

Plot