Optical constants

Refractive index of AgGaSe₂ (Silver gallium selenide, AGSe)

Harasaki and Kato 1997: n(e) 0.81–16 µm

Data: formula 4
Range: 0.81–16 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: 2.58823
Extinction coefficient k: 0

Permittivity ε₁: 6.69894
Permittivity ε₂: 0

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

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.00568803 µm⁻¹

Group index n_g: 2.60871
Group velocity dispersion: 235.719 fs²/mm

Dispersion parameter D: -34.2602 ps/(nm·km)
Photon energy: 0.344401 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): Harasaki and Kato 1997: n(e) 0.81–16 µm
aggase2 = ls.fetch_refractiveindex("main", "AgGaSe2", "Harasaki-e", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(aggase2.range_nm)  # (810, 16000) nm
eps = aggase2.eps([3600])  # 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_c874e5684812/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/harasaki-kato-1997-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=810, 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} = 6.6792 + \frac{0.4598 λ^{0.0}}{λ^{2} - {0.2122}^{1.0}} - 0.00126 λ^{2.0}

Valid from 0.81 to 16.0 µm.

Coefficients as stored

C_i	Value
C1	6.6792
C2	0.4598
C3	0.0
C4	0.2122
C5	1.0
C6	0.0
C7	0.0
C8	0.0
C9	1.0
C10	-0.00126
C11	2.0

Comments and conditions

Extraordinary ray (e)

Conditions

direction: e

References

A. Harasaki and K. Kato. New data on the nonlinear optical constant, phase-matching, and optical damage of AgGaS₂. Jap. J. Appl. Phys., 36, 700-703 (1997)

doi:10.1143/jjap.36.700 New Data on the Nonlinear Optical Constant, Phase-Matching, and Optical Damage of AgGaS <sub>2</sub>, Japanese Journal of Applied Physics (1997)

Cite

Akiko Harasaki Akiko Harasaki and Kiyoshi Kato Kiyoshi Kato. New Data on the Nonlinear Optical Constant, Phase-Matching, and Optical Damage of AgGaS <sub>2</sub>. 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

AgGaSe2 (Silver gallium selenide, AGSe), Harasaki and Kato 1997: n(e) 0.81–16 µm: n and k versus wavelength
λ (µm)	n
0.81	2.777443
0.816079	2.773376
0.822204	2.769419
0.828374	2.765569
0.834591	2.76182
0.840855	2.75817
0.847165	2.754616
0.853523	2.751154
0.859929	2.74778
0.866383	2.744492
0.872885	2.741287
0.879436	2.738162
0.886036	2.735114
0.892686	2.732142
0.899386	2.729242
0.906135	2.726412
0.912936	2.72365
0.919788	2.720954
0.926691	2.718321
0.933645	2.715751
0.940652	2.71324
0.947712	2.710788
0.954824	2.708392
0.96199	2.706051
0.96921	2.703763
0.976484	2.701526
0.983813	2.699339
0.991196	2.697201
0.998635	2.695111
1.00613	2.693066
1.01368	2.691066
1.02129	2.689109
1.02895	2.687195
1.03668	2.685321
1.04446	2.683488
1.05229	2.681693
1.06019	2.679936
1.06815	2.678216
1.07616	2.676532
1.08424	2.674883
1.09238	2.673267
1.10058	2.671685
1.10884	2.670135
1.11716	2.668617
1.12554	2.667129
1.13399	2.665672
1.1425	2.664243
1.15108	2.662843
1.15971	2.66147
1.16842	2.660125
1.17719	2.658806
1.18602	2.657513
1.19492	2.656245
1.20389	2.655002
1.21293	2.653782
1.22203	2.652586
1.2312	2.651413
1.24044	2.650262
1.24975	2.649133
1.25913	2.648026
1.26858	2.646939
1.2781	2.645872
1.28769	2.644826
1.29736	2.643798
1.30709	2.64279
1.3169	2.641801
1.32679	2.640829
1.33674	2.639876
1.34677	2.63894
1.35688	2.63802
1.36707	2.637118
1.37733	2.636231
1.38766	2.635361
1.39808	2.634506
1.40857	2.633667
1.41914	2.632842
1.42979	2.632032
1.44052	2.631236
1.45133	2.630455
1.46223	2.629687
1.4732	2.628932
1.48426	2.62819
1.49539	2.627462
1.50662	2.626746
1.51792	2.626042
1.52932	2.625351
1.54079	2.624671
1.55236	2.624003
1.56401	2.623346
1.57575	2.6227
1.58757	2.622066
1.59949	2.621442
1.61149	2.620828
1.62359	2.620225
1.63577	2.619632
1.64805	2.619048
1.66042	2.618475
1.67288	2.617911
1.68543	2.617356
1.69808	2.61681
1.71082	2.616273
1.72366	2.615745
1.7366	2.615226
1.74963	2.614714
1.76276	2.614212
1.77599	2.613717
1.78932	2.61323
1.80275	2.612751
1.81628	2.61228
1.82991	2.611816
1.84365	2.61136
1.85748	2.61091
1.87142	2.610468
1.88547	2.610033
1.89962	2.609604
1.91388	2.609182
1.92824	2.608767
1.94271	2.608358
1.95729	2.607956
1.97198	2.607559
1.98678	2.607169
2.00169	2.606784
2.01671	2.606406
2.03185	2.606033
2.0471	2.605666
2.06246	2.605304
2.07794	2.604948
2.09353	2.604597
2.10925	2.604251
2.12508	2.60391
2.14102	2.603574
2.15709	2.603243
2.17328	2.602917
2.18959	2.602596
2.20603	2.602279
2.22258	2.601967
2.23926	2.601659
2.25607	2.601356
2.273	2.601057
2.29006	2.600762
2.30725	2.600472
2.32456	2.600185
2.34201	2.599902
2.35958	2.599623
2.37729	2.599348
2.39513	2.599077
2.41311	2.598809
2.43122	2.598545
2.44947	2.598285
2.46785	2.598028
2.48637	2.597774
2.50503	2.597524
2.52383	2.597277
2.54277	2.597033
2.56186	2.596792
2.58108	2.596554
2.60045	2.59632
2.61997	2.596088
2.63963	2.595859
2.65944	2.595633
2.6794	2.59541
2.69951	2.595189
2.71977	2.594971
2.74018	2.594756
2.76075	2.594543
2.78147	2.594332
2.80234	2.594124
2.82337	2.593919
2.84456	2.593715
2.86591	2.593514
2.88742	2.593316
2.90909	2.593119
2.93092	2.592924
2.95292	2.592732
2.97508	2.592542
2.99741	2.592353
3.0199	2.592167
3.04257	2.591982
3.0654	2.591799
3.08841	2.591618
3.11159	2.591439
3.13494	2.591261
3.15847	2.591085
3.18217	2.590911
3.20605	2.590738
3.23012	2.590567
3.25436	2.590397
3.27878	2.590229
3.30339	2.590062
3.32818	2.589897
3.35316	2.589732
3.37832	2.589569
3.40368	2.589408
3.42922	2.589247
3.45496	2.589088
3.48089	2.58893
3.50701	2.588773
3.53333	2.588617
3.55985	2.588462
3.58657	2.588308
3.61348	2.588154
3.6406	2.588002
3.66793	2.587851
3.69545	2.5877
3.72319	2.587551
3.75113	2.587402
3.77928	2.587254
3.80765	2.587106
3.83622	2.586959
3.86501	2.586813
3.89402	2.586667
3.92324	2.586522
3.95269	2.586378
3.98235	2.586233
4.01224	2.58609
4.04235	2.585947
4.07269	2.585804
4.10326	2.585661
4.13405	2.585519
4.16508	2.585377
4.19634	2.585235
4.22783	2.585094
4.25956	2.584953
4.29153	2.584812
4.32373	2.584671
4.35618	2.58453
4.38888	2.584389
4.42182	2.584248
4.455	2.584107
4.48844	2.583966
4.52212	2.583825
4.55606	2.583684
4.59025	2.583543
4.6247	2.583402
4.65941	2.58326
4.69438	2.583118
4.72961	2.582976
4.76511	2.582834
4.80087	2.582691
4.8369	2.582548
4.8732	2.582405
4.90977	2.582261
4.94662	2.582116
4.98375	2.581971
5.02115	2.581826
5.05883	2.58168
5.0968	2.581533
5.13505	2.581386
5.17359	2.581238
5.21242	2.58109
5.25154	2.58094
5.29095	2.58079
5.33066	2.580639
5.37066	2.580487
5.41097	2.580335
5.45158	2.580181
5.49249	2.580027
5.53372	2.579871
5.57525	2.579715
5.61709	2.579557
5.65924	2.579399
5.70172	2.579239
5.74451	2.579078
5.78762	2.578916
5.83106	2.578753
5.87482	2.578588
5.91891	2.578422
5.96333	2.578255
6.00809	2.578087
6.05318	2.577917
6.0986	2.577745
6.14437	2.577572
6.19049	2.577398
6.23695	2.577222
6.28376	2.577044
6.33092	2.576865
6.37843	2.576684
6.4263	2.576501
6.47453	2.576316
6.52312	2.57613
6.57208	2.575942
6.6214	2.575752
6.67109	2.57556
6.72116	2.575365
6.7716	2.575169
6.82242	2.574971
6.87362	2.574771
6.92521	2.574568
6.97718	2.574364
7.02955	2.574157
7.0823	2.573947
7.13546	2.573736
7.18901	2.573522
7.24296	2.573305
7.29732	2.573086
7.35209	2.572865
7.40726	2.572641
7.46286	2.572414
7.51886	2.572184
7.57529	2.571952
7.63215	2.571717
7.68942	2.571479
7.74713	2.571238
7.80528	2.570994
7.86385	2.570747
7.92287	2.570497
7.98233	2.570244
8.04224	2.569988
8.1026	2.569729
8.16341	2.569466
8.22467	2.569199
8.2864	2.56893
8.34859	2.568657
8.41125	2.56838
8.47437	2.568099
8.53797	2.567815
8.60205	2.567528
8.66661	2.567236
8.73165	2.56694
8.79718	2.566641
8.8632	2.566337
8.92972	2.56603
8.99674	2.565718
9.06426	2.565402
9.13229	2.565082
9.20083	2.564757
9.26988	2.564428
9.33945	2.564094
9.40954	2.563756
9.48016	2.563413
9.55131	2.563066
9.62299	2.562713
9.69521	2.562356
9.76797	2.561993
9.84128	2.561626
9.91514	2.561253
9.98955	2.560875
10.0645	2.560492
10.1401	2.560103
10.2162	2.559709
10.2928	2.559309
10.3701	2.558903
10.4479	2.558492
10.5263	2.558075
10.6053	2.557651
10.6849	2.557222
10.7651	2.556786
10.8459	2.556345
10.9273	2.555896
11.0093	2.555442
11.0919	2.55498
11.1752	2.554512
11.259	2.554038
11.3435	2.553556
11.4287	2.553067
11.5144	2.552571
11.6009	2.552068
11.6879	2.551557
11.7756	2.551039
11.864	2.550514
11.9531	2.54998
12.0428	2.549439
12.1331	2.54889
12.2242	2.548332
12.3159	2.547767
12.4084	2.547193
12.5015	2.54661
12.5953	2.546019
12.6899	2.545419
12.7851	2.54481
12.881	2.544192
12.9777	2.543565
13.0751	2.542928
13.1732	2.542282
13.2721	2.541627
13.3717	2.540961
13.4721	2.540286
13.5732	2.5396
13.675	2.538904
13.7777	2.538197
13.8811	2.53748
13.9853	2.536753
14.0902	2.536014
14.196	2.535264
14.3025	2.534502
14.4098	2.53373
14.518	2.532945
14.6269	2.532149
14.7367	2.53134
14.8473	2.53052
14.9587	2.529687
15.071	2.528841
15.1841	2.527982
15.2981	2.52711
15.4129	2.526226
15.5286	2.525327
15.6451	2.524415
15.7625	2.523489
15.8808	2.522549
16	2.521594

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/Harasaki-e.yml
ID: ds_c874e5684812
API: /v1/datasets/ds_c874e5684812

Plot