Optical constants

Refractive index of SnSe (Tin selenide)

Guo et al. 2022: n,k(α) 0.193–1.69 µm

Data: tabulated nk
Range: 0.193–1.69 µm
Points: 1084
Optical axis: alpha
Licence: CC0-1.0

Biaxial crystal, axes: alpha

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.26061
Extinction coefficient k: 0

Permittivity ε₁: 1.58913
Permittivity ε₂: 0

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

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.076 µm⁻¹

Group index n_g: 1.30527
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

# SnSe (Tin selenide): Guo et al. 2022: n,k(α) 0.193–1.69 µm
snse = ls.fetch_refractiveindex("main", "SnSe", "Guo-α", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(snse.range_nm)  # (193, 1690) nm
eps = snse.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_4c9ad4083188/lightsmith"
snse = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(snse.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (snse/guo-2022).

# ... load snse as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=snse)],
    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

n_α, k_α; room temperature.

Conditions

direction: alpha

References

Z. Guo, H. Gu, Y. Yu, Z. Wei, S. Liu. Broadband and incident-angle-modulation near-infrared polarizers based on optically anisotropic SnSe. Nanomaterials, 13, 134 (2022) (Numerical data kindly provided by Zhengfeng Guo)

doi:10.3390/nano13010134 Broadband and Incident-Angle-Modulation Near-Infrared Polarizers Based on Optically Anisotropic SnSe, Nanomaterials (2022)

Cite

Zhengfeng Guo, Honggang Gu, Yali Yu, Zhongming Wei and Shiyuan Liu. Broadband and Incident-Angle-Modulation Near-Infrared Polarizers Based on Optically Anisotropic SnSe. Nanomaterials, 13, 134 (2022), doi:10.3390/nano13010134; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

1084 rows as published

CSV comma separated TXT tab separated YAML n, k Full database record original YAML All quantities CSV JSON metadata

SnSe (Tin selenide), Guo et al. 2022: n,k(α) 0.193–1.69 µm: n and k versus wavelength
λ (µm)	n	k
0.193	1.49106	0.0
0.194	1.487875	0.0
0.195	1.48475	0.0
0.196	1.481685	0.0
0.197	1.478678	0.0
0.198	1.475727	0.0
0.199	1.472832	0.0
0.2	1.46999	0.0
0.201	1.4672	0.0
0.202	1.464462	0.0
0.203	1.461773	0.0
0.204	1.459133	0.0
0.205	1.45654	0.0
0.206	1.453994	0.0
0.207	1.451493	0.0
0.208	1.449036	0.0
0.209	1.446623	0.0
0.21	1.444251	0.0
0.211	1.441921	0.0
0.212	1.43963	0.0
0.213	1.437379	0.0
0.214	1.435166	0.0
0.215	1.432991	0.0
0.216	1.430853	0.0
0.217	1.42875	0.0
0.218	1.426682	0.0
0.219	1.424649	0.0
0.22	1.422649	0.0
0.221	1.420682	0.0
0.222	1.418747	0.0
0.223	1.416843	0.0
0.224	1.41497	0.0
0.225	1.413127	0.0
0.226	1.411313	0.0
0.227	1.409528	0.0
0.228	1.407771	0.0
0.229	1.406042	0.0
0.23	1.40434	0.0
0.231	1.402664	0.0
0.232	1.401014	0.0
0.233	1.399389	0.0
0.234	1.397789	0.0
0.235	1.396214	0.0
0.236	1.394662	0.0
0.237	1.393134	0.0
0.238	1.391628	0.0
0.239	1.390145	0.0
0.24	1.388684	0.0
0.241	1.387244	0.0
0.242	1.385825	0.0
0.243	1.384427	0.0
0.244	1.383049	0.0
0.245	1.381692	0.0
0.246	1.380353	0.0
0.247	1.379034	0.0
0.248	1.377734	0.0
0.249	1.376452	0.0
0.25	1.375188	0.0
0.251	1.373942	0.0
0.252	1.372713	0.0
0.253	1.371501	0.0
0.254	1.370306	0.0
0.255	1.369127	0.0
0.256	1.367965	0.0
0.257	1.366818	0.0
0.258	1.365687	0.0
0.259	1.364571	0.0
0.26	1.36347	0.0
0.261	1.362384	0.0
0.262	1.361313	0.0
0.263	1.360255	0.0
0.264	1.359211	0.0
0.265	1.358182	0.0
0.266	1.357165	0.0
0.267	1.356162	0.0
0.268	1.355172	0.0
0.269	1.354194	0.0
0.27	1.353229	0.0
0.271	1.352277	0.0
0.272	1.351336	0.0
0.273	1.350408	0.0
0.274	1.349491	0.0
0.275	1.348585	0.0
0.276	1.347691	0.0
0.277	1.346808	0.0
0.278	1.345936	0.0
0.279	1.345075	0.0
0.28	1.344224	0.0
0.281	1.343384	0.0
0.282	1.342554	0.0
0.283	1.341734	0.0
0.284	1.340924	0.0
0.285	1.340124	0.0
0.286	1.339333	0.0
0.287	1.338552	0.0
0.288	1.33778	0.0
0.289	1.337017	0.0
0.29	1.336263	0.0
0.291	1.335518	0.0
0.292	1.334781	0.0
0.293	1.334054	0.0
0.294	1.333334	0.0
0.295	1.332623	0.0
0.296	1.33192	0.0
0.297	1.331225	0.0
0.298	1.330539	0.0
0.299	1.329859	0.0
0.3	1.329188	0.0
0.301	1.328524	0.0
0.302	1.327868	0.0
0.303	1.327219	0.0
0.304	1.326577	0.0
0.305	1.325942	0.0
0.306	1.325314	0.0
0.307	1.324693	0.0
0.308	1.324079	0.0
0.309	1.323472	0.0
0.31	1.322871	0.0
0.311	1.322277	0.0
0.312	1.321689	0.0
0.313	1.321108	0.0
0.314	1.320533	0.0
0.315	1.319964	0.0
0.316	1.319401	0.0
0.317	1.318843	0.0
0.318	1.318292	0.0
0.319	1.317747	0.0
0.32	1.317207	0.0
0.321	1.316673	0.0
0.322	1.316145	0.0
0.323	1.315622	0.0
0.324	1.315104	0.0
0.325	1.314592	0.0
0.326	1.314085	0.0
0.327	1.313583	0.0
0.328	1.313086	0.0
0.329	1.312595	0.0
0.33	1.312108	0.0
0.331	1.311626	0.0
0.332	1.311149	0.0
0.333	1.310677	0.0
0.334	1.31021	0.0
0.335	1.309747	0.0
0.336	1.309289	0.0
0.337	1.308835	0.0
0.338	1.308385	0.0
0.339	1.307941	0.0
0.34	1.3075	0.0
0.341	1.307064	0.0
0.342	1.306632	0.0
0.343	1.306204	0.0
0.344	1.30578	0.0
0.345	1.305361	0.0
0.346	1.304945	0.0
0.347	1.304533	0.0
0.348	1.304126	0.0
0.349	1.303722	0.0
0.35	1.303322	0.0
0.351	1.302925	0.0
0.352	1.302533	0.0
0.353	1.302144	0.0
0.354	1.301759	0.0
0.355	1.301377	0.0
0.356	1.300999	0.0
0.357	1.300624	0.0
0.358	1.300253	0.0
0.359	1.299885	0.0
0.36	1.29952	0.0
0.361	1.299159	0.0
0.362	1.298801	0.0
0.363	1.298447	0.0
0.364	1.298095	0.0
0.365	1.297747	0.0
0.366	1.297402	0.0
0.367	1.29706	0.0
0.368	1.296721	0.0
0.369	1.296385	0.0
0.37	1.296052	0.0
0.371	1.295722	0.0
0.372	1.295395	0.0
0.373	1.29507	0.0
0.374	1.294749	0.0
0.375	1.29443	0.0
0.376	1.294114	0.0
0.377	1.293801	0.0
0.378	1.293491	0.0
0.379	1.293183	0.0
0.38	1.292878	0.0
0.381	1.292575	0.0
0.382	1.292275	0.0
0.383	1.291978	0.0
0.384	1.291683	0.0
0.385	1.291391	0.0
0.386	1.291101	0.0
0.387	1.290813	0.0
0.388	1.290528	0.0
0.389	1.290246	0.0
0.39	1.289965	0.0
0.391	1.289687	0.0
0.392	1.289412	0.0
0.393	1.289138	0.0
0.394	1.288867	0.0
0.395	1.288598	0.0
0.396	1.288332	0.0
0.397	1.288067	0.0
0.398	1.287805	0.0
0.399	1.287545	0.0
0.4	1.287286	0.0
0.401	1.28703	0.0
0.402	1.286776	0.0
0.403	1.286525	0.0
0.404	1.286275	0.0
0.405	1.286027	0.0
0.406	1.285781	0.0
0.407	1.285537	0.0
0.408	1.285295	0.0
0.409	1.285055	0.0
0.41	1.284816	0.0
0.411	1.28458	0.0
0.412	1.284346	0.0
0.413	1.284113	0.0
0.414	1.283882	0.0
0.415	1.283653	0.0
0.416	1.283426	0.0
0.417	1.2832	0.0
0.418	1.282976	0.0
0.419	1.282754	0.0
0.42	1.282534	0.0
0.421	1.282315	0.0
0.422	1.282098	0.0
0.423	1.281883	0.0
0.424	1.281669	0.0
0.425	1.281457	0.0
0.426	1.281246	0.0
0.427	1.281037	0.0
0.428	1.28083	0.0
0.429	1.280624	0.0
0.43	1.28042	0.0
0.431	1.280217	0.0
0.432	1.280016	0.0
0.433	1.279816	0.0
0.434	1.279618	0.0
0.435	1.279421	0.0
0.436	1.279226	0.0
0.437	1.279032	0.0
0.438	1.278839	0.0
0.439	1.278648	0.0
0.44	1.278459	0.0
0.441	1.27827	0.0
0.442	1.278083	0.0
0.443	1.277898	0.0
0.444	1.277714	0.0
0.445	1.277531	0.0
0.446	1.277349	0.0
0.447	1.277169	0.0
0.448	1.27699	0.0
0.449	1.276812	0.0
0.45	1.276635	0.0
0.451	1.27646	0.0
0.452	1.276286	0.0
0.453	1.276113	0.0
0.454	1.275942	0.0
0.455	1.275771	0.0
0.456	1.275602	0.0
0.457	1.275434	0.0
0.458	1.275267	0.0
0.459	1.275102	0.0
0.46	1.274937	0.0
0.461	1.274774	0.0
0.462	1.274611	0.0
0.463	1.27445	0.0
0.464	1.27429	0.0
0.465	1.274131	0.0
0.466	1.273973	0.0
0.467	1.273817	0.0
0.468	1.273661	0.0
0.469	1.273506	0.0
0.47	1.273353	0.0
0.471	1.2732	0.0
0.472	1.273049	0.0
0.473	1.272898	0.0
0.474	1.272748	0.0
0.475	1.2726	0.0
0.476	1.272452	0.0
0.477	1.272306	0.0
0.478	1.27216	0.0
0.479	1.272016	0.0
0.48	1.271872	0.0
0.481	1.271729	0.0
0.482	1.271587	0.0
0.483	1.271447	0.0
0.484	1.271307	0.0
0.485	1.271168	0.0
0.486	1.27103	0.0
0.487	1.270893	0.0
0.488	1.270756	0.0
0.489	1.270621	0.0
0.49	1.270486	0.0
0.491	1.270353	0.0
0.492	1.27022	0.0
0.493	1.270088	0.0
0.494	1.269957	0.0
0.495	1.269826	0.0
0.496	1.269697	0.0
0.497	1.269568	0.0
0.498	1.269441	0.0
0.499	1.269314	0.0
0.5	1.269187	0.0
0.501	1.269062	0.0
0.502	1.268937	0.0
0.503	1.268814	0.0
0.504	1.268691	0.0
0.505	1.268568	0.0
0.506	1.268447	0.0
0.507	1.268326	0.0
0.508	1.268206	0.0
0.509	1.268087	0.0
0.51	1.267968	0.0
0.511	1.26785	0.0
0.512	1.267733	0.0
0.513	1.267617	0.0
0.514	1.267501	0.0
0.515	1.267386	0.0
0.516	1.267272	0.0
0.517	1.267159	0.0
0.518	1.267046	0.0
0.519	1.266934	0.0
0.52	1.266822	0.0
0.521	1.266711	0.0
0.522	1.266601	0.0
0.523	1.266492	0.0
0.524	1.266383	0.0
0.525	1.266275	0.0
0.526	1.266167	0.0
0.527	1.266061	0.0
0.528	1.265954	0.0
0.529	1.265849	0.0
0.53	1.265744	0.0
0.531	1.265639	0.0
0.532	1.265536	0.0
0.533	1.265433	0.0
0.534	1.26533	0.0
0.535	1.265228	0.0
0.536	1.265127	0.0
0.537	1.265026	0.0
0.538	1.264926	0.0
0.539	1.264826	0.0
0.54	1.264727	0.0
0.541	1.264629	0.0
0.542	1.264531	0.0
0.543	1.264434	0.0
0.544	1.264337	0.0
0.545	1.264241	0.0
0.546	1.264145	0.0
0.547	1.26405	0.0
0.548	1.263956	0.0
0.549	1.263862	0.0
0.55	1.263769	0.0
0.551	1.263676	0.0
0.552	1.263583	0.0
0.553	1.263492	0.0
0.554	1.2634	0.0
0.555	1.263309	0.0
0.556	1.263219	0.0
0.557	1.263129	0.0
0.558	1.26304	0.0
0.559	1.262951	0.0
0.56	1.262863	0.0
0.561	1.262775	0.0
0.562	1.262688	0.0
0.563	1.262601	0.0
0.564	1.262515	0.0
0.565	1.262429	0.0
0.566	1.262344	0.0
0.567	1.262259	0.0
0.568	1.262174	0.0
0.569	1.26209	0.0
0.57	1.262007	0.0
0.571	1.261924	0.0
0.572	1.261841	0.0
0.573	1.261759	0.0
0.574	1.261677	0.0
0.575	1.261596	0.0
0.576	1.261515	0.0
0.577	1.261435	0.0
0.578	1.261355	0.0
0.579	1.261275	0.0
0.58	1.261196	0.0
0.581	1.261117	0.0
0.582	1.261039	0.0
0.583	1.260961	0.0
0.584	1.260884	0.0
0.585	1.260807	0.0
0.586	1.26073	0.0
0.587	1.260654	0.0
0.588	1.260578	0.0
0.589	1.260503	0.0
0.59	1.260428	0.0
0.591	1.260353	0.0
0.592	1.260279	0.0
0.593	1.260205	0.0
0.594	1.260132	0.0
0.595	1.260059	0.0
0.596	1.259986	0.0
0.597	1.259914	0.0
0.598	1.259842	0.0
0.599	1.259771	0.0
0.6	1.259699	0.0
0.601	1.259629	0.0
0.602	1.259558	0.0
0.603	1.259488	0.0
0.604	1.259418	0.0
0.605	1.259349	0.0
0.606	1.25928	0.0
0.607	1.259212	0.0
0.608	1.259143	0.0
0.609	1.259075	0.0
0.61	1.259008	0.0
0.611	1.258941	0.0
0.612	1.258874	0.0
0.613	1.258807	0.0
0.614	1.258741	0.0
0.615	1.258675	0.0
0.616	1.25861	0.0
0.617	1.258544	0.0
0.618	1.258479	0.0
0.619	1.258415	0.0
0.62	1.258351	0.0
0.621	1.258287	0.0
0.622	1.258223	0.0
0.623	1.25816	0.0
0.624	1.258097	0.0
0.625	1.258034	0.0
0.626	1.257972	0.0
0.627	1.25791	0.0
0.628	1.257848	0.0
0.629	1.257787	0.0
0.63	1.257726	0.0
0.631	1.257665	0.0
0.632	1.257604	0.0
0.633	1.257544	0.0
0.634	1.257484	0.0
0.635	1.257424	0.0
0.636	1.257365	0.0
0.637	1.257306	0.0
0.638	1.257247	0.0
0.639	1.257189	0.0
0.64	1.257131	0.0
0.641	1.257073	0.0
0.642	1.257015	0.0
0.643	1.256958	0.0
0.644	1.256901	0.0
0.645	1.256844	0.0
0.646	1.256787	0.0
0.647	1.256731	0.0
0.648	1.256675	0.0
0.649	1.256619	0.0
0.65	1.256564	0.0
0.651	1.256509	0.0
0.652	1.256454	0.0
0.653	1.256399	0.0
0.654	1.256345	0.0
0.655	1.256291	0.0
0.656	1.256237	0.0
0.657	1.256183	0.0
0.658	1.25613	0.0
0.659	1.256076	0.0
0.66	1.256024	0.0
0.661	1.255971	0.0
0.662	1.255919	0.0
0.663	1.255866	0.0
0.664	1.255814	0.0
0.665	1.255763	0.0
0.666	1.255711	0.0
0.667	1.25566	0.0
0.668	1.255609	0.0
0.669	1.255558	0.0
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1.53	1.242132	0.0
1.5325	1.242122	0.0
1.535	1.242112	0.0
1.5375	1.242102	0.0
1.54	1.242092	0.0
1.5425	1.242082	0.0
1.545	1.242072	0.0
1.5475	1.242062	0.0
1.55	1.242052	0.0
1.5525	1.242042	0.0
1.555	1.242033	0.0
1.5575	1.242023	0.0
1.56	1.242013	0.0
1.5625	1.242004	0.0
1.565	1.241994	0.0
1.5675	1.241985	0.0
1.57	1.241975	0.0
1.5725	1.241966	0.0
1.575	1.241957	0.0
1.5775	1.241947	0.0
1.58	1.241938	0.0
1.5825	1.241929	0.0
1.585	1.24192	0.0
1.5875	1.241911	0.0
1.59	1.241902	0.0
1.5925	1.241893	0.0
1.595	1.241884	0.0
1.5975	1.241875	0.0
1.6	1.241866	0.0
1.6025	1.241857	0.0
1.605	1.241848	0.0
1.6075	1.241839	0.0
1.61	1.241831	0.0
1.6125	1.241822	0.0
1.615	1.241813	0.0
1.6175	1.241805	0.0
1.62	1.241796	0.0
1.6225	1.241787	0.0
1.625	1.241779	0.0
1.6275	1.241771	0.0
1.63	1.241762	0.0
1.6325	1.241754	0.0
1.635	1.241745	0.0
1.6375	1.241737	0.0
1.64	1.241729	0.0
1.6425	1.241721	0.0
1.645	1.241712	0.0
1.6475	1.241704	0.0
1.65	1.241696	0.0
1.6525	1.241688	0.0
1.655	1.24168	0.0
1.6575	1.241672	0.0
1.66	1.241664	0.0
1.6625	1.241656	0.0
1.665	1.241648	0.0
1.6675	1.24164	0.0
1.67	1.241633	0.0
1.6725	1.241625	0.0
1.675	1.241617	0.0
1.6775	1.241609	0.0
1.68	1.241602	0.0
1.6825	1.241594	0.0
1.685	1.241586	0.0
1.6875	1.241579	0.0
1.69	1.241571	0.0

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: —

SnSe (Tin selenide): all datasets

About SnSe (Tin selenide)

Tin selenide (SnSe) is a layered semiconducting material with an orthorhombic crystal structure. This material has attracted significant attention due to its remarkable thermoelectric properties, particularly at low temperatures. SnSe has one of the highest thermoelectric efficiencies, making it a promising candidate for thermoelectric energy conversion, which can transform waste heat into electricity. The intrinsic p-type conductivity of SnSe can also be of interest for optoelectronic applications. Similar to other layered materials, SnSe can be exfoliated into nanosheets, opening avenues for research in the realm of two-dimensional materials. The combination of its unique properties makes SnSe a material of considerable research interest in both the energy and electronics sectors.

More about SnSe (Tin selenide) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/main/SnSe/nk/Guo-alpha.yml
ID: ds_4c9ad4083188
API: /v1/datasets/ds_4c9ad4083188

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