Optical constants

Refractive index of AgGaS₂ (Silver gallium sulfide, AGS)

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

Data: formula 4
Range: 0.54–12.9 µm
Temperature: 293 K
Optical axis: o
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: 2.57477
Extinction coefficient k: 0

Permittivity ε₁: 6.62943
Permittivity ε₂: 0

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

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.690758 µm⁻¹

Group index n_g: 2.98066
Group velocity dispersion: 1619.3 fs²/mm

Dispersion parameter D: -8834.15 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(o) 0.54–12.9 µm
aggas2 = ls.fetch_refractiveindex("main", "AgGaS2", "Kato-o", 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_d3b46672cd90/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-o).

# ... 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} = 5.79419 + \frac{0.23114 λ^{0.0}}{λ^{2} - {0.06882}^{1.0}} - 0.0024534 λ^{2.0} + 3.1814 \times 10^{-7} λ^{4.0} - 9.7051 \times 10^{-9} λ^{6.0}

Valid from 0.54 to 12.9 µm.

Coefficients as stored

C_i	Value
C1	5.79419
C2	0.23114
C3	0.0
C4	0.06882
C5	1.0
C6	0.0
C7	0.0
C8	0.0
C9	1.0
C10	-0.0024534
C11	2.0
C12	3.1814e-07
C13	4.0
C14	-9.7051e-09
C15	6.0

Comments and conditions

Ordinary ray (o); 20.0 °C

Conditions

temperature: 293 K
direction: o

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(o) 0.54–12.9 µm: n and k versus wavelength
λ (µm)	n
0.54	2.613618
0.544312	2.609533
0.548658	2.605544
0.553039	2.601649
0.557456	2.597846
0.561907	2.59413
0.566394	2.5905
0.570917	2.586953
0.575475	2.583488
0.580071	2.5801
0.584703	2.576789
0.589372	2.573552
0.594078	2.570387
0.598822	2.567291
0.603603	2.564264
0.608423	2.561303
0.613281	2.558407
0.618178	2.555573
0.623115	2.5528
0.62809	2.550087
0.633106	2.547431
0.638161	2.544832
0.643257	2.542287
0.648393	2.539796
0.653571	2.537357
0.65879	2.534969
0.66405	2.53263
0.669353	2.530339
0.674698	2.528095
0.680085	2.525897
0.685516	2.523744
0.69099	2.521635
0.696507	2.519568
0.702069	2.517542
0.707675	2.515557
0.713326	2.513612
0.719022	2.511705
0.724764	2.509835
0.730551	2.508003
0.736385	2.506207
0.742265	2.504445
0.748192	2.502718
0.754166	2.501025
0.760188	2.499364
0.766258	2.497735
0.772377	2.496137
0.778545	2.49457
0.784761	2.493033
0.791028	2.491525
0.797344	2.490046
0.803711	2.488595
0.810129	2.487171
0.816598	2.485773
0.823119	2.484402
0.829691	2.483056
0.836316	2.481735
0.842995	2.480439
0.849726	2.479167
0.856511	2.477918
0.863351	2.476692
0.870244	2.475489
0.877193	2.474307
0.884198	2.473147
0.891258	2.472008
0.898375	2.47089
0.905549	2.469792
0.91278	2.468714
0.920068	2.467655
0.927415	2.466615
0.934821	2.465594
0.942286	2.46459
0.94981	2.463605
0.957394	2.462637
0.965039	2.461686
0.972745	2.460752
0.980513	2.459835
0.988342	2.458933
0.996234	2.458048
1.00419	2.457177
1.01221	2.456322
1.02029	2.455482
1.02844	2.454656
1.03665	2.453845
1.04493	2.453048
1.05327	2.452264
1.06168	2.451494
1.07016	2.450737
1.0787	2.449993
1.08732	2.449261
1.096	2.448542
1.10475	2.447835
1.11357	2.447141
1.12247	2.446457
1.13143	2.445786
1.14046	2.445125
1.14957	2.444476
1.15875	2.443838
1.168	2.44321
1.17733	2.442592
1.18673	2.441985
1.19621	2.441388
1.20576	2.440801
1.21539	2.440223
1.22509	2.439655
1.23487	2.439096
1.24474	2.438546
1.25467	2.438005
1.26469	2.437473
1.27479	2.43695
1.28497	2.436435
1.29523	2.435928
1.30557	2.43543
1.316	2.434939
1.32651	2.434456
1.3371	2.433981
1.34778	2.433514
1.35854	2.433054
1.36939	2.432601
1.38032	2.432155
1.39134	2.431716
1.40245	2.431284
1.41365	2.430859
1.42494	2.43044
1.43632	2.430028
1.44779	2.429622
1.45935	2.429223
1.471	2.428829
1.48275	2.428441
1.49459	2.42806
1.50652	2.427684
1.51855	2.427314
1.53068	2.426949
1.5429	2.42659
1.55522	2.426236
1.56764	2.425887
1.58016	2.425543
1.59278	2.425205
1.60549	2.424871
1.61831	2.424542
1.63124	2.424218
1.64426	2.423899
1.65739	2.423584
1.67063	2.423274
1.68397	2.422968
1.69741	2.422666
1.71097	2.422368
1.72463	2.422075
1.7384	2.421786
1.75228	2.4215
1.76628	2.421219
1.78038	2.420941
1.7946	2.420667
1.80893	2.420397
1.82337	2.42013
1.83793	2.419867
1.85261	2.419607
1.8674	2.41935
1.88231	2.419097
1.89734	2.418847
1.91249	2.4186
1.92776	2.418356
1.94316	2.418115
1.95867	2.417877
1.97431	2.417642
1.99008	2.41741
2.00597	2.417181
2.02199	2.416954
2.03813	2.41673
2.05441	2.416508
2.07081	2.416289
2.08735	2.416073
2.10402	2.415858
2.12082	2.415646
2.13775	2.415437
2.15482	2.415229
2.17203	2.415024
2.18937	2.414821
2.20686	2.41462
2.22448	2.41442
2.24224	2.414223
2.26014	2.414028
2.27819	2.413834
2.29638	2.413643
2.31472	2.413453
2.3332	2.413264
2.35184	2.413078
2.37062	2.412892
2.38954	2.412709
2.40863	2.412527
2.42786	2.412346
2.44725	2.412167
2.46679	2.411989
2.48648	2.411812
2.50634	2.411637
2.52635	2.411462
2.54653	2.411289
2.56686	2.411117
2.58736	2.410947
2.60802	2.410777
2.62884	2.410608
2.64983	2.41044
2.67099	2.410273
2.69232	2.410106
2.71382	2.409941
2.73549	2.409776
2.75733	2.409612
2.77935	2.409449
2.80155	2.409286
2.82392	2.409124
2.84647	2.408962
2.86919	2.408801
2.89211	2.408641
2.9152	2.40848
2.93848	2.40832
2.96194	2.408161
2.98559	2.408002
3.00943	2.407843
3.03346	2.407684
3.05769	2.407525
3.0821	2.407367
3.10671	2.407208
3.13152	2.40705
3.15653	2.406892
3.18173	2.406733
3.20714	2.406575
3.23275	2.406416
3.25856	2.406257
3.28458	2.406098
3.31081	2.405939
3.33725	2.405779
3.3639	2.40562
3.39076	2.405459
3.41783	2.405299
3.44512	2.405138
3.47263	2.404976
3.50036	2.404814
3.52831	2.404651
3.55649	2.404488
3.58489	2.404324
3.61351	2.40416
3.64237	2.403994
3.67145	2.403828
3.70077	2.403661
3.73032	2.403493
3.76011	2.403324
3.79013	2.403154
3.8204	2.402984
3.8509	2.402812
3.88165	2.402639
3.91265	2.402465
3.94389	2.40229
3.97538	2.402113
4.00713	2.401936
4.03913	2.401756
4.07138	2.401576
4.10389	2.401394
4.13666	2.401211
4.16969	2.401026
4.20299	2.40084
4.23655	2.400652
4.27038	2.400462
4.30448	2.400271
4.33885	2.400078
4.3735	2.399883
4.40842	2.399686
4.44362	2.399488
4.4791	2.399287
4.51487	2.399085
4.55092	2.39888
4.58726	2.398673
4.62389	2.398464
4.66081	2.398253
4.69803	2.39804
4.73554	2.397824
4.77336	2.397606
4.81147	2.397386
4.84989	2.397162
4.88862	2.396937
4.92766	2.396709
4.96701	2.396478
5.00667	2.396244
5.04665	2.396007
5.08695	2.395768
5.12757	2.395526
5.16851	2.39528
5.20978	2.395032
5.25138	2.39478
5.29331	2.394526
5.33558	2.394268
5.37819	2.394006
5.42113	2.393742
5.46442	2.393474
5.50806	2.393202
5.55204	2.392926
5.59637	2.392647
5.64106	2.392364
5.6861	2.392078
5.73151	2.391787
5.77728	2.391492
5.82341	2.391194
5.86991	2.390891
5.91678	2.390584
5.96403	2.390272
6.01165	2.389956
6.05965	2.389635
6.10804	2.38931
6.15681	2.38898
6.20598	2.388646
6.25553	2.388306
6.30548	2.387962
6.35583	2.387612
6.40659	2.387257
6.45774	2.386897
6.50931	2.386532
6.56129	2.386161
6.61368	2.385784
6.66649	2.385402
6.71972	2.385013
6.77338	2.384619
6.82747	2.384219
6.88199	2.383813
6.93694	2.3834
6.99233	2.382981
7.04817	2.382555
7.10445	2.382122
7.16118	2.381683
7.21836	2.381237
7.276	2.380783
7.3341	2.380323
7.39266	2.379855
7.4517	2.379379
7.5112	2.378896
7.57118	2.378405
7.63163	2.377906
7.69257	2.377398
7.754	2.376882
7.81591	2.376358
7.87833	2.375825
7.94124	2.375283
8.00465	2.374732
8.06857	2.374172
8.13299	2.373603
8.19794	2.373023
8.2634	2.372434
8.32938	2.371835
8.39589	2.371226
8.46294	2.370606
8.53051	2.369975
8.59863	2.369333
8.66729	2.36868
8.7365	2.368016
8.80626	2.36734
8.87658	2.366652
8.94746	2.365952
9.01891	2.365239
9.09093	2.364513
9.16352	2.363774
9.23669	2.363022
9.31045	2.362257
9.38479	2.361477
9.45973	2.360682
9.53527	2.359874
9.61141	2.35905
9.68816	2.35821
9.76552	2.357355
9.8435	2.356484
9.9221	2.355596
10.0013	2.354691
10.0812	2.353768
10.1617	2.352828
10.2428	2.351869
10.3246	2.350892
10.4071	2.349895
10.4902	2.348879
10.5739	2.347842
10.6584	2.346784
10.7435	2.345705
10.8293	2.344604
10.9157	2.34348
11.0029	2.342333
11.0908	2.341162
11.1793	2.339967
11.2686	2.338746
11.3586	2.3375
11.4493	2.336226
11.5407	2.334926
11.6328	2.333597
11.7257	2.332238
11.8194	2.33085
11.9137	2.329431
12.0089	2.32798
12.1048	2.326496
12.2014	2.324978
12.2989	2.323425
12.3971	2.321836
12.4961	2.32021
12.5958	2.318545
12.6964	2.316841
12.7978	2.315096
12.9	2.313308

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-o.yml
ID: ds_d3b46672cd90
API: /v1/datasets/ds_d3b46672cd90

Plot