Optical constants

Refractive index of AgGaSe₂ (Silver gallium selenide, AGSe)

Boyd et al. 1972: n(e) 0.725–13.5 µm

Data: formula 2
Range: 0.725–13.5 µm
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: 2.59193
Extinction coefficient k: 0

Permittivity ε₁: 6.7181
Permittivity ε₂: 0

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

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.00677748 µm⁻¹

Group index n_g: 2.61314
Group velocity dispersion: 259.92 fs²/mm

Dispersion parameter D: -49.9748 ps/(nm·km)
Photon energy: 0.396116 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

# AgGaSe2 (Silver gallium selenide, AGSe): Boyd et al. 1972: n(e) 0.725–13.5 µm
aggase2 = ls.fetch_refractiveindex("main", "AgGaSe2", "Boyd-e", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(aggase2.range_nm)  # (725, 13500) nm
eps = aggase2.eps([3130])  # 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_3e16c61d20b7/lightsmith"
aggase2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(aggase2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (aggase2/boyd-1972-e).

# ... load aggase2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=aggase2)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=725, 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_3e16c61d20b7/lightsmith?model=drude_lorentz"
aggase2_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 = 4.2912 + \frac{1.397 λ^{2}}{λ^{2} - 0.2845} + \frac{1.9282 λ^{2}}{λ^{2} - 1600.0}

Valid from 0.725 to 13.5 µm.

Coefficients as stored

C_i	Value
C1	4.2912
C2	1.397
C3	0.2845
C4	1.9282
C5	1600.0

Comments and conditions

Extraordinary ray(e)

Conditions

direction: e

References

1) G. D. Boyd, H. M. Kasper, J. H McFee, F. G Storz. Linear and nonlinear optical properties of some ternary selenides. IEEE J. Quantum Electron., 8, 900-908 (1972)
2) G. C. Bhar. Refractive index interpolation in phase-matching. Appl. Opt. 15, 305-307 (1976)
* Ref. 2 provides a dispersion formula based on data from Ref. 1

doi:10.1109/jqe.1972.1076900 Linear and nonlinear optical properties of some ternary selenides, IEEE Journal of Quantum Electronics (1972)
doi:10.1364/ao.15.0305_1 Refractive index interpolation in phase-matching, Applied Optics (1976)

Cite

G. Boyd, H. Kasper, J. McFee and F. Storz. Linear and nonlinear optical properties of some ternary selenides. IEEE Journal of Quantum Electronics, 8, 900-908 (1972), doi:10.1109/jqe.1972.1076900; Gopal C. Bhar. Refractive index interpolation in phase-matching. Applied Optics, 15, 305_1 (1976), doi:10.1364/ao.15.0305_1; 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

AgGaSe2 (Silver gallium selenide, AGSe), Boyd et al. 1972: n(e) 0.725–13.5 µm: n and k versus wavelength
λ (µm)	n
0.725	2.88719
0.730333	2.878273
0.735705	2.86975
0.741117	2.861595
0.746569	2.853786
0.75206	2.846303
0.757593	2.839126
0.763165	2.832236
0.768779	2.825619
0.774434	2.819258
0.780131	2.81314
0.785869	2.807252
0.79165	2.801581
0.797474	2.796116
0.80334	2.790847
0.809249	2.785763
0.815202	2.780856
0.821198	2.776118
0.827239	2.771539
0.833324	2.767113
0.839454	2.762832
0.845629	2.75869
0.851849	2.75468
0.858116	2.750797
0.864428	2.747036
0.870786	2.74339
0.877192	2.739855
0.883644	2.736427
0.890145	2.733101
0.896692	2.729872
0.903288	2.726738
0.909933	2.723693
0.916626	2.720735
0.923369	2.717861
0.930161	2.715066
0.937003	2.712349
0.943896	2.709705
0.950839	2.707133
0.957833	2.70463
0.964879	2.702194
0.971977	2.699821
0.979127	2.69751
0.986329	2.695259
0.993584	2.693065
1.00089	2.690927
1.00826	2.688843
1.01567	2.68681
1.02314	2.684828
1.03067	2.682894
1.03825	2.681007
1.04589	2.679166
1.05358	2.677369
1.06133	2.675614
1.06914	2.673901
1.077	2.672227
1.08493	2.670593
1.09291	2.668996
1.10095	2.667436
1.10904	2.665911
1.1172	2.664421
1.12542	2.662964
1.1337	2.661539
1.14204	2.660146
1.15044	2.658783
1.1589	2.65745
1.16743	2.656146
1.17601	2.65487
1.18466	2.653622
1.19338	2.6524
1.20216	2.651204
1.211	2.650033
1.21991	2.648886
1.22888	2.647764
1.23792	2.646664
1.24703	2.645587
1.2562	2.644532
1.26544	2.643499
1.27475	2.642486
1.28413	2.641494
1.29357	2.640522
1.30309	2.639569
1.31267	2.638635
1.32233	2.637719
1.33206	2.636821
1.34185	2.635941
1.35173	2.635077
1.36167	2.634231
1.37168	2.6334
1.38177	2.632586
1.39194	2.631787
1.40218	2.631003
1.41249	2.630234
1.42288	2.629479
1.43335	2.628739
1.44389	2.628012
1.45451	2.627299
1.46521	2.626599
1.47599	2.625911
1.48685	2.625237
1.49779	2.624574
1.5088	2.623924
1.5199	2.623285
1.53108	2.622658
1.54234	2.622042
1.55369	2.621436
1.56512	2.620842
1.57663	2.620258
1.58823	2.619685
1.59991	2.619121
1.61168	2.618567
1.62354	2.618023
1.63548	2.617489
1.64751	2.616963
1.65963	2.616447
1.67184	2.615939
1.68413	2.61544
1.69652	2.61495
1.709	2.614467
1.72157	2.613993
1.73424	2.613527
1.74699	2.613069
1.75985	2.612618
1.77279	2.612175
1.78583	2.611739
1.79897	2.61131
1.8122	2.610888
1.82553	2.610473
1.83896	2.610065
1.85249	2.609663
1.86611	2.609268
1.87984	2.608879
1.89367	2.608496
1.9076	2.60812
1.92163	2.607749
1.93577	2.607384
1.95001	2.607025
1.96435	2.606672
1.9788	2.606324
1.99336	2.605981
2.00802	2.605644
2.02279	2.605312
2.03767	2.604985
2.05266	2.604663
2.06776	2.604346
2.08297	2.604033
2.09829	2.603725
2.11372	2.603422
2.12927	2.603124
2.14493	2.602829
2.16071	2.60254
2.17661	2.602254
2.19262	2.601972
2.20875	2.601695
2.22499	2.601421
2.24136	2.601152
2.25785	2.600886
2.27446	2.600624
2.29119	2.600366
2.30804	2.600111
2.32502	2.59986
2.34212	2.599612
2.35935	2.599368
2.37671	2.599127
2.39419	2.598889
2.4118	2.598655
2.42954	2.598423
2.44741	2.598195
2.46542	2.59797
2.48355	2.597747
2.50182	2.597528
2.52022	2.597311
2.53876	2.597097
2.55744	2.596886
2.57625	2.596677
2.5952	2.596471
2.61429	2.596268
2.63352	2.596067
2.65289	2.595868
2.67241	2.595672
2.69206	2.595478
2.71187	2.595287
2.73182	2.595098
2.75191	2.594911
2.77215	2.594726
2.79255	2.594543
2.81309	2.594362
2.83378	2.594183
2.85462	2.594006
2.87562	2.593831
2.89678	2.593658
2.91808	2.593486
2.93955	2.593317
2.96117	2.593149
2.98296	2.592983
3.0049	2.592818
3.027	2.592655
3.04927	2.592494
3.0717	2.592334
3.09429	2.592175
3.11705	2.592018
3.13998	2.591863
3.16308	2.591709
3.18635	2.591556
3.20979	2.591404
3.2334	2.591254
3.25718	2.591105
3.28114	2.590957
3.30528	2.59081
3.32959	2.590664
3.35408	2.59052
3.37876	2.590376
3.40361	2.590233
3.42865	2.590092
3.45387	2.589951
3.47927	2.589811
3.50487	2.589672
3.53065	2.589534
3.55662	2.589397
3.58278	2.589261
3.60914	2.589125
3.63569	2.58899
3.66243	2.588855
3.68937	2.588721
3.71651	2.588588
3.74385	2.588456
3.77139	2.588324
3.79913	2.588192
3.82707	2.588061
3.85523	2.58793
3.88359	2.5878
3.91215	2.58767
3.94093	2.587541
3.96992	2.587412
3.99912	2.587283
4.02854	2.587154
4.05817	2.587026
4.08802	2.586898
4.1181	2.58677
4.14839	2.586642
4.1789	2.586515
4.20964	2.586387
4.24061	2.58626
4.2718	2.586132
4.30323	2.586005
4.33488	2.585877
4.36677	2.58575
4.39889	2.585622
4.43125	2.585494
4.46384	2.585366
4.49668	2.585238
4.52975	2.58511
4.56308	2.584981
4.59664	2.584853
4.63045	2.584724
4.66451	2.584594
4.69883	2.584464
4.73339	2.584334
4.76821	2.584204
4.80328	2.584073
4.83862	2.583941
4.87421	2.583809
4.91006	2.583676
4.94618	2.583543
4.98257	2.58341
5.01922	2.583275
5.05614	2.58314
5.09333	2.583004
5.1308	2.582868
5.16854	2.582731
5.20656	2.582593
5.24486	2.582454
5.28344	2.582314
5.3223	2.582174
5.36145	2.582032
5.40089	2.58189
5.44062	2.581746
5.48064	2.581602
5.52096	2.581456
5.56157	2.581309
5.60248	2.581162
5.64369	2.581013
5.6852	2.580863
5.72702	2.580711
5.76915	2.580558
5.81159	2.580404
5.85434	2.580249
5.8974	2.580092
5.94078	2.579934
5.98448	2.579775
6.0285	2.579614
6.07285	2.579451
6.11752	2.579287
6.16252	2.579121
6.20785	2.578954
6.25352	2.578784
6.29952	2.578613
6.34586	2.578441
6.39254	2.578266
6.43956	2.57809
6.48693	2.577911
6.53465	2.577731
6.58271	2.577549
6.63114	2.577365
6.67991	2.577178
6.72905	2.57699
6.77855	2.576799
6.82841	2.576606
6.87864	2.576411
6.92924	2.576213
6.98021	2.576013
7.03156	2.575811
7.08328	2.575606
7.13538	2.575398
7.18787	2.575188
7.24075	2.574976
7.29401	2.57476
7.34766	2.574542
7.40171	2.574321
7.45616	2.574097
7.511	2.57387
7.56625	2.573641
7.62191	2.573408
7.67798	2.573172
7.73446	2.572933
7.79135	2.57269
7.84866	2.572445
7.9064	2.572196
7.96456	2.571943
8.02314	2.571687
8.08216	2.571428
8.14161	2.571164
8.2015	2.570898
8.26183	2.570627
8.3226	2.570352
8.38383	2.570074
8.4455	2.569791
8.50762	2.569505
8.5702	2.569214
8.63324	2.568919
8.69675	2.568619
8.76072	2.568315
8.82517	2.568007
8.89008	2.567694
8.95548	2.567376
9.02135	2.567054
9.08771	2.566727
9.15456	2.566394
9.2219	2.566057
9.28974	2.565714
9.35807	2.565367
9.42691	2.565013
9.49625	2.564655
9.56611	2.56429
9.63648	2.56392
9.70736	2.563545
9.77877	2.563163
9.8507	2.562775
9.92316	2.562381
9.99615	2.561981
10.0697	2.561575
10.1438	2.561162
10.2184	2.560742
10.2935	2.560315
10.3693	2.559882
10.4455	2.559441
10.5224	2.558993
10.5998	2.558538
10.6777	2.558076
10.7563	2.557605
10.8354	2.557127
10.9151	2.556641
10.9954	2.556147
11.0763	2.555645
11.1578	2.555134
11.2398	2.554614
11.3225	2.554086
11.4058	2.553548
11.4897	2.553002
11.5742	2.552446
11.6594	2.55188
11.7451	2.551305
11.8315	2.55072
11.9186	2.550124
12.0062	2.549518
12.0945	2.548902
12.1835	2.548275
12.2731	2.547636
12.3634	2.546986
12.4544	2.546325
12.546	2.545652
12.6383	2.544967
12.7312	2.544269
12.8249	2.543559
12.9192	2.542836
13.0142	2.5421
13.11	2.541351
13.2064	2.540587
13.3036	2.53981
13.4014	2.539018
13.5	2.538211

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: —

AgGaSe₂ (Silver gallium selenide, AGSe): all datasets

About AgGaSe2 (Silver gallium selenide, AGSe)

AgGaSe₂, often abbreviated as AGSe, is a ternary I-III-VI₂ chalcogenide compound known for its exceptional nonlinear optical properties. It crystallizes in a monoclinic structure and has a broad transparency range that extends from the visible to the mid-infrared regions of the electromagnetic spectrum. One of the standout features of AgGaSe₂ is its high nonlinear optical coefficient, which makes it especially useful in applications requiring frequency conversion, such as second-harmonic generation (SHG), sum-frequency generation (SFG), and parametric down-conversion. The compound is commonly employed in optical parametric oscillators (OPOs) and other tunable laser systems designed for mid-infrared applications. Its properties are highly anisotropic, which necessitates precise crystal orientation during device fabrication. While AGSe offers many advantages in terms of its optical characteristics, it is also sensitive to thermal and mechanical stresses, making careful handling and environmental control crucial for maintaining its performance. Overall, AgGaSe₂ is a pivotal material in the field of nonlinear optics, and it continues to be the focus of extensive research aimed at better understanding its properties and potential applications.

More about AgGaSe2 (Silver gallium selenide, AGSe) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/main/AgGaSe2/nk/Boyd-e.yml
ID: ds_3e16c61d20b7
API: /v1/datasets/ds_3e16c61d20b7

Plot