Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 2.96384
Extinction coefficient k: 0

Permittivity ε₁: 8.78432
Permittivity ε₂: 0

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

Abbe number V_d: —
Chromatic dispersion dn/dλ: -0.04 µm⁻¹

Group index n_g: 2.98734
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

# WSe2 (Tungsten diselenide): Zotev et al. 2023: n,k(e) 0.36–1.0 µm
wse2 = ls.fetch_refractiveindex("main", "WSe2", "Zotev-e", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(wse2.range_nm)  # (360, 1000) nm
eps = wse2.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_55f9d0cc0879/lightsmith"
wse2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(wse2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (wse2/zotev-2023-e).

# ... load wse2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=wse2)],
    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

Multilayer crystals. Out-of-plane (extraordinary ray, e). Room temperature.

Conditions

direction: e

References

P. G. Zotev, Y. Wang, D. Andres-Penares, T. Severs-Millard, S. Randerson, X. Hu, L. Sortino, C. Louca, M. Brotons-Gisbert, T. Huq, S. Vezzoli, R. Sapienza, T. F. Krauss, B. D. Gerardot, A. I. Tartakovskii. Van der Waals materials for applications in nanophotonics. Laser and Photonics Rev. 17, 2200957 (2023) (Numerical data kindly provided by Panaiot Zotev)

doi:10.1002/lpor.202200957 Van der Waals Materials for Applications in Nanophotonics, Laser & Photonics Reviews (2023)

Cite

Panaiot G. Zotev et al.. Van der Waals Materials for Applications in Nanophotonics. Laser & Photonics Reviews, 17, 2200957 (2023), doi:10.1002/lpor.202200957; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

402 rows as published

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

WSe2 (Tungsten diselenide), Zotev et al. 2023: n,k(e) 0.36–1.0 µm: n and k versus wavelength
λ (µm)	n	k
0.36	2.98687	0.0
0.362	2.98654	0.0
0.363	2.98622	0.0
0.365	2.9859	0.0
0.366	2.98559	0.0
0.368	2.98528	0.0
0.37	2.98498	0.0
0.371	2.98468	0.0
0.373	2.98438	0.0
0.374	2.98409	0.0
0.376	2.9838	0.0
0.378	2.98351	0.0
0.379	2.98323	0.0
0.381	2.98295	0.0
0.382	2.98267	0.0
0.384	2.9824	0.0
0.386	2.98213	0.0
0.387	2.98187	0.0
0.389	2.98161	0.0
0.39	2.98135	0.0
0.392	2.98109	0.0
0.394	2.98084	0.0
0.395	2.98059	0.0
0.397	2.98035	0.0
0.398	2.9801	0.0
0.4	2.97986	0.0
0.402	2.97963	0.0
0.403	2.97939	0.0
0.405	2.97916	0.0
0.406	2.97893	0.0
0.408	2.9787	0.0
0.41	2.97848	0.0
0.411	2.97826	0.0
0.413	2.97804	0.0
0.414	2.97782	0.0
0.416	2.97761	0.0
0.418	2.9774	0.0
0.419	2.97719	0.0
0.421	2.97698	0.0
0.422	2.97678	0.0
0.424	2.97658	0.0
0.426	2.97638	0.0
0.427	2.97618	0.0
0.429	2.97599	0.0
0.43	2.97579	0.0
0.432	2.9756	0.0
0.434	2.97541	0.0
0.435	2.97523	0.0
0.437	2.97504	0.0
0.438	2.97486	0.0
0.44	2.97468	0.0
0.442	2.9745	0.0
0.443	2.97432	0.0
0.445	2.97415	0.0
0.446	2.97398	0.0
0.448	2.97381	0.0
0.45	2.97364	0.0
0.451	2.97347	0.0
0.453	2.9733	0.0
0.454	2.97314	0.0
0.456	2.97298	0.0
0.458	2.97282	0.0
0.459	2.97266	0.0
0.461	2.9725	0.0
0.462	2.97235	0.0
0.464	2.97219	0.0
0.466	2.97204	0.0
0.467	2.97189	0.0
0.469	2.97174	0.0
0.47	2.97159	0.0
0.472	2.97145	0.0
0.474	2.9713	0.0
0.475	2.97116	0.0
0.477	2.97102	0.0
0.478	2.97088	0.0
0.48	2.97074	0.0
0.482	2.9706	0.0
0.483	2.97046	0.0
0.485	2.97033	0.0
0.486	2.9702	0.0
0.488	2.97006	0.0
0.49	2.96993	0.0
0.491	2.9698	0.0
0.493	2.96967	0.0
0.494	2.96955	0.0
0.496	2.96942	0.0
0.498	2.9693	0.0
0.499	2.96917	0.0
0.501	2.96905	0.0
0.502	2.96893	0.0
0.504	2.96881	0.0
0.506	2.96869	0.0
0.507	2.96857	0.0
0.509	2.96846	0.0
0.51	2.96834	0.0
0.512	2.96823	0.0
0.514	2.96811	0.0
0.515	2.968	0.0
0.517	2.96789	0.0
0.518	2.96778	0.0
0.52	2.96767	0.0
0.522	2.96756	0.0
0.523	2.96745	0.0
0.525	2.96735	0.0
0.526	2.96724	0.0
0.528	2.96714	0.0
0.53	2.96704	0.0
0.531	2.96693	0.0
0.532	2.96688	0.0
0.533	2.96683	0.0
0.534	2.96673	0.0
0.536	2.96663	0.0
0.538	2.96653	0.0
0.539	2.96643	0.0
0.541	2.96634	0.0
0.542	2.96624	0.0
0.544	2.96615	0.0
0.546	2.96605	0.0
0.547	2.96596	0.0
0.549	2.96586	0.0
0.55	2.96577	0.0
0.552	2.96568	0.0
0.554	2.96559	0.0
0.555	2.9655	0.0
0.557	2.96541	0.0
0.558	2.96532	0.0
0.56	2.96524	0.0
0.562	2.96515	0.0
0.563	2.96506	0.0
0.565	2.96498	0.0
0.566	2.96489	0.0
0.568	2.96481	0.0
0.57	2.96473	0.0
0.571	2.96464	0.0
0.573	2.96456	0.0
0.574	2.96448	0.0
0.576	2.9644	0.0
0.578	2.96432	0.0
0.579	2.96424	0.0
0.581	2.96416	0.0
0.582	2.96409	0.0
0.584	2.96401	0.0
0.586	2.96393	0.0
0.587	2.96386	0.0
0.589	2.96378	0.0
0.59	2.96371	0.0
0.592	2.96363	0.0
0.594	2.96356	0.0
0.595	2.96349	0.0
0.597	2.96341	0.0
0.598	2.96334	0.0
0.6	2.96327	0.0
0.602	2.9632	0.0
0.603	2.96313	0.0
0.605	2.96306	0.0
0.606	2.96299	0.0
0.608	2.96293	0.0
0.61	2.96286	0.0
0.611	2.96279	0.0
0.613	2.96272	0.0
0.614	2.96266	0.0
0.616	2.96259	0.0
0.618	2.96253	0.0
0.619	2.96246	0.0
0.621	2.9624	0.0
0.622	2.96233	0.0
0.624	2.96227	0.0
0.626	2.96221	0.0
0.627	2.96215	0.0
0.629	2.96208	0.0
0.63	2.96202	0.0
0.632	2.96196	0.0
0.634	2.9619	0.0
0.635	2.96184	0.0
0.637	2.96178	0.0
0.638	2.96172	0.0
0.64	2.96167	0.0
0.642	2.96161	0.0
0.643	2.96155	0.0
0.645	2.96149	0.0
0.646	2.96144	0.0
0.648	2.96138	0.0
0.65	2.96132	0.0
0.651	2.96127	0.0
0.653	2.96121	0.0
0.654	2.96116	0.0
0.656	2.9611	0.0
0.658	2.96105	0.0
0.659	2.961	0.0
0.661	2.96094	0.0
0.662	2.96089	0.0
0.664	2.96084	0.0
0.666	2.96078	0.0
0.667	2.96073	0.0
0.669	2.96068	0.0
0.67	2.96063	0.0
0.672	2.96058	0.0
0.674	2.96053	0.0
0.675	2.96048	0.0
0.677	2.96043	0.0
0.678	2.96038	0.0
0.68	2.96033	0.0
0.682	2.96028	0.0
0.683	2.96024	0.0
0.685	2.96019	0.0
0.686	2.96014	0.0
0.688	2.96009	0.0
0.69	2.96005	0.0
0.691	2.96	0.0
0.693	2.95995	0.0
0.694	2.95991	0.0
0.696	2.95986	0.0
0.698	2.95982	0.0
0.699	2.95977	0.0
0.701	2.95973	0.0
0.702	2.95968	0.0
0.704	2.95964	0.0
0.706	2.9596	0.0
0.707	2.95955	0.0
0.709	2.95951	0.0
0.71	2.95947	0.0
0.712	2.95943	0.0
0.714	2.95938	0.0
0.715	2.95934	0.0
0.717	2.9593	0.0
0.718	2.95926	0.0
0.72	2.95922	0.0
0.722	2.95918	0.0
0.723	2.95914	0.0
0.725	2.9591	0.0
0.726	2.95906	0.0
0.728	2.95902	0.0
0.73	2.95898	0.0
0.731	2.95894	0.0
0.733	2.9589	0.0
0.734	2.95886	0.0
0.736	2.95882	0.0
0.738	2.95878	0.0
0.739	2.95874	0.0
0.741	2.95871	0.0
0.742	2.95867	0.0
0.744	2.95863	0.0
0.746	2.95859	0.0
0.747	2.95856	0.0
0.749	2.95852	0.0
0.75	2.95849	0.0
0.752	2.95845	0.0
0.754	2.95841	0.0
0.755	2.95838	0.0
0.757	2.95834	0.0
0.758	2.95831	0.0
0.76	2.95827	0.0
0.762	2.95824	0.0
0.763	2.9582	0.0
0.765	2.95817	0.0
0.766	2.95813	0.0
0.768	2.9581	0.0
0.77	2.95807	0.0
0.771	2.95803	0.0
0.773	2.958	0.0
0.774	2.95797	0.0
0.776	2.95793	0.0
0.778	2.9579	0.0
0.779	2.95787	0.0
0.781	2.95784	0.0
0.782	2.95781	0.0
0.784	2.95777	0.0
0.786	2.95774	0.0
0.787	2.95771	0.0
0.789	2.95768	0.0
0.79	2.95765	0.0
0.792	2.95762	0.0
0.794	2.95759	0.0
0.795	2.95756	0.0
0.797	2.95753	0.0
0.798	2.9575	0.0
0.8	2.95747	0.0
0.802	2.95744	0.0
0.803	2.95741	0.0
0.805	2.95738	0.0
0.806	2.95735	0.0
0.808	2.95732	0.0
0.81	2.95729	0.0
0.811	2.95726	0.0
0.813	2.95723	0.0
0.814	2.9572	0.0
0.816	2.95718	0.0
0.818	2.95715	0.0
0.819	2.95712	0.0
0.821	2.95709	0.0
0.822	2.95706	0.0
0.824	2.95704	0.0
0.826	2.95701	0.0
0.827	2.95698	0.0
0.829	2.95696	0.0
0.83	2.95693	0.0
0.832	2.9569	0.0
0.834	2.95688	0.0
0.835	2.95685	0.0
0.837	2.95682	0.0
0.838	2.9568	0.0
0.84	2.95677	0.0
0.842	2.95675	0.0
0.843	2.95672	0.0
0.845	2.95669	0.0
0.846	2.95667	0.0
0.848	2.95664	0.0
0.85	2.95662	0.0
0.851	2.95659	0.0
0.853	2.95657	0.0
0.854	2.95655	0.0
0.856	2.95652	0.0
0.858	2.9565	0.0
0.859	2.95647	0.0
0.861	2.95645	0.0
0.862	2.95642	0.0
0.864	2.9564	0.0
0.866	2.95638	0.0
0.867	2.95635	0.0
0.869	2.95633	0.0
0.87	2.95631	0.0
0.872	2.95628	0.0
0.874	2.95626	0.0
0.875	2.95624	0.0
0.877	2.95622	0.0
0.878	2.95619	0.0
0.88	2.95617	0.0
0.882	2.95615	0.0
0.883	2.95613	0.0
0.885	2.9561	0.0
0.886	2.95608	0.0
0.888	2.95606	0.0
0.89	2.95604	0.0
0.891	2.95602	0.0
0.893	2.95599	0.0
0.894	2.95597	0.0
0.896	2.95595	0.0
0.898	2.95593	0.0
0.899	2.95591	0.0
0.901	2.95589	0.0
0.902	2.95587	0.0
0.904	2.95585	0.0
0.906	2.95583	0.0
0.907	2.95581	0.0
0.909	2.95579	0.0
0.91	2.95576	0.0
0.912	2.95574	0.0
0.914	2.95572	0.0
0.915	2.9557	0.0
0.917	2.95568	0.0
0.918	2.95566	0.0
0.92	2.95565	0.0
0.922	2.95563	0.0
0.923	2.95561	0.0
0.925	2.95559	0.0
0.926	2.95557	0.0
0.928	2.95555	0.0
0.93	2.95553	0.0
0.931	2.95551	0.0
0.933	2.95549	0.0
0.934	2.95547	0.0
0.936	2.95545	0.0
0.938	2.95544	0.0
0.939	2.95542	0.0
0.941	2.9554	0.0
0.942	2.95538	0.0
0.944	2.95536	0.0
0.946	2.95534	0.0
0.947	2.95533	0.0
0.949	2.95531	0.0
0.95	2.95529	0.0
0.952	2.95527	0.0
0.954	2.95525	0.0
0.955	2.95524	0.0
0.957	2.95522	0.0
0.958	2.9552	0.0
0.96	2.95518	0.0
0.962	2.95517	0.0
0.963	2.95515	0.0
0.965	2.95513	0.0
0.966	2.95512	0.0
0.968	2.9551	0.0
0.97	2.95508	0.0
0.971	2.95507	0.0
0.973	2.95505	0.0
0.974	2.95503	0.0
0.976	2.95502	0.0
0.978	2.955	0.0
0.979	2.95498	0.0
0.981	2.95497	0.0
0.982	2.95495	0.0
0.984	2.95493	0.0
0.986	2.95492	0.0
0.987	2.9549	0.0
0.989	2.95489	0.0
0.99	2.95487	0.0
0.992	2.95486	0.0
0.994	2.95484	0.0
0.995	2.95482	0.0
0.997	2.95481	0.0
0.998	2.95479	0.0
1.0	2.95478	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: —

Plot