At one wavelength

Refractive index n: 1.494
Extinction coefficient k: 3.49640e-07

Permittivity ε₁: 2.23204
Permittivity ε₂: 1.04472e-06

Absorption coefficient α: 0.0747738 cm⁻¹
Penetration depth δ = λ/(2πk): 2.67474e+08 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: 0 µm⁻¹

Group index n_g: 1.494
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

# EVASKY S87: Vogt et al. 2016: n,k 0.25–2.5 µm
evasky_s87 = ls.fetch_refractiveindex("other", "EVASKY_S87", "Vogt", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(evasky_s87.range_nm)  # (250, 2500) nm
eps = evasky_s87.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_f072e7533cb9/lightsmith"
evasky_s87 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(evasky_s87.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (evasky-s87/vogt-2016).

# ... load evasky_s87 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=evasky_s87)],
    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

Ethylene-vinyl acetate (EVA) with enhanced UV transmission. Room temperature.

References

1) M. R. Vogt, H. Schulte-Huxel, D. Hinken, H. Holst, M. Winter, S. Blankemeyer, R. Witteck, M. Köntges, K. Bothe, R. Brendel. Optical constants of UV transparent EVA and the impact on the PV module output power under realistic illumination. Energy Procedia 92, 523-530 (2016)
2) M. R. Vogt. Development of physical models for the simulation of optical properties of solar cell modules. PhD. Thesis (2015)

doi:10.1016/j.egypro.2016.07.136 Optical Constants of UV Transparent EVA and the Impact on the PV Module Output Power under Realistic Irradiation, Energy Procedia (2016)

Cite

Malte R. Vogt et al.. Optical Constants of UV Transparent EVA and the Impact on the PV Module Output Power under Realistic Irradiation. Energy Procedia, 92, 523-530 (2016), doi:10.1016/j.egypro.2016.07.136; M. R. Vogt. Development of physical models for the simulation of optical properties of solar cell modules. PhD. Thesis (2015); Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

226 rows as published

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

EVASKY S87, Vogt et al. 2016: n,k 0.25–2.5 µm: n and k versus wavelength
λ (µm)	n	k
0.25	1.557	9.86e-06
0.26	1.551	9.7e-06
0.27	1.545	8.2e-06
0.28	1.54	6.64e-06
0.29	1.536	5.31e-06
0.3	1.532	3.89e-06
0.31	1.528	3.11e-06
0.32	1.525	2.64e-06
0.33	1.522	2.28e-06
0.34	1.519	1.95e-06
0.35	1.517	1.56e-06
0.36	1.515	1.27e-06
0.37	1.513	1.07e-06
0.38	1.511	9.48e-07
0.39	1.51	8.57e-07
0.4	1.508	7.84e-07
0.41	1.507	7.37e-07
0.42	1.506	6.96e-07
0.43	1.505	6.62e-07
0.44	1.504	6.33e-07
0.45	1.503	6.04e-07
0.46	1.502	5.78e-07
0.47	1.501	5.55e-07
0.48	1.5	5.32e-07
0.49	1.499	5.1e-07
0.5	1.499	4.9e-07
0.51	1.498	4.7e-07
0.52	1.497	4.52e-07
0.53	1.497	4.33e-07
0.54	1.496	4.17e-07
0.55	1.496	4.02e-07
0.56	1.495	3.87e-07
0.57	1.495	3.74e-07
0.58	1.494	3.58e-07
0.59	1.494	3.47e-07
0.6	1.493	3.34e-07
0.61	1.493	3.23e-07
0.62	1.493	3.12e-07
0.63	1.492	3.03e-07
0.64	1.492	2.96e-07
0.65	1.492	2.88e-07
0.66	1.491	2.74e-07
0.67	1.491	2.64e-07
0.68	1.491	2.56e-07
0.69	1.491	2.49e-07
0.7	1.49	2.43e-07
0.71	1.49	2.36e-07
0.72	1.49	2.32e-07
0.73	1.49	2.32e-07
0.74	1.49	2.38e-07
0.75	1.489	2.53e-07
0.76	1.489	2.59e-07
0.77	1.489	2.4e-07
0.78	1.489	2.1e-07
0.79	1.489	1.94e-07
0.8	1.488	1.89e-07
0.81	1.488	1.91e-07
0.82	1.488	1.97e-07
0.83	1.488	2.01e-07
0.84	1.488	1.98e-07
0.85	1.488	1.91e-07
0.86	1.488	1.88e-07
0.87	1.487	1.91e-07
0.88	1.487	2.19e-07
0.89	1.487	2.89e-07
0.9	1.487	3.86e-07
0.91	1.487	5.64e-07
0.92	1.487	8.43e-07
0.93	1.487	1.05e-06
0.94	1.487	9.3e-07
0.95	1.487	5.35e-07
0.96	1.487	2.72e-07
0.97	1.486	2.16e-07
0.98	1.486	2.05e-07
0.99	1.486	2.35e-07
1.0	1.486	3e-07
1.01	1.486	3.98e-07
1.02	1.486	4.99e-07
1.03	1.486	6.01e-07
1.04	1.486	6.68e-07
1.05	1.486	6.33e-07
1.06	1.486	5.33e-07
1.07	1.486	4.4e-07
1.08	1.486	3.69e-07
1.09	1.486	3.26e-07
1.1	1.486	3.11e-07
1.11	1.485	3.41e-07
1.12	1.485	4.28e-07
1.13	1.485	6.35e-07
1.14	1.485	1.08e-06
1.15	1.485	1.99e-06
1.16	1.485	3.31e-06
1.17	1.485	4.83e-06
1.18	1.485	6.59e-06
1.19	1.485	9.23e-06
1.2	1.485	1.3e-05
1.21	1.485	1.59e-05
1.22	1.485	1.34e-05
1.23	1.485	8.47e-06
1.24	1.485	5.03e-06
1.25	1.485	3.26e-06
1.26	1.485	2.32e-06
1.27	1.485	1.82e-06
1.28	1.485	1.53e-06
1.29	1.485	1.35e-06
1.3	1.485	1.21e-06
1.31	1.485	1.08e-06
1.32	1.485	1e-06
1.33	1.484	1.04e-06
1.34	1.484	1.26e-06
1.35	1.484	1.79e-06
1.36	1.484	2.66e-06
1.37	1.484	4.44e-06
1.38	1.484	7.21e-06
1.39	1.484	1.04e-05
1.4	1.484	1.16e-05
1.41	1.484	1.2e-05
1.42	1.484	1.23e-05
1.43	1.484	1.15e-05
1.44	1.484	1.02e-05
1.45	1.484	8.63e-06
1.46	1.484	7.16e-06
1.47	1.484	5.8e-06
1.48	1.484	4.66e-06
1.49	1.484	3.89e-06
1.5	1.484	3.4e-06
1.51	1.484	3.19e-06
1.52	1.484	3.18e-06
1.53	1.484	3.29e-06
1.54	1.484	3.24e-06
1.55	1.484	2.86e-06
1.56	1.484	2.47e-06
1.57	1.484	2.25e-06
1.58	1.484	2.15e-06
1.59	1.484	2.18e-06
1.6	1.484	2.3e-06
1.61	1.484	2.56e-06
1.62	1.484	3.01e-06
1.63	1.484	3.78e-06
1.64	1.484	4.94e-06
1.65	1.484	6.79e-06
1.66	1.484	9.65e-06
1.67	1.484	1.39e-05
1.68	1.484	1.89e-05
1.69	1.484	2.5e-05
1.7	1.484	3.46e-05
1.71	1.484	5.29e-05
1.72	1.484	8.61e-05
1.73	1.484	9.8e-05
1.74	1.484	8.69e-05
1.75	1.484	8.12e-05
1.76	1.484	8.2e-05
1.77	1.484	7.23e-05
1.78	1.484	6.15e-05
1.79	1.483	5.72e-05
1.8	1.483	5.64e-05
1.81	1.483	5.58e-05
1.82	1.483	5.32e-05
1.83	1.483	5e-05
1.84	1.483	4.56e-05
1.85	1.483	4.13e-05
1.86	1.483	3.78e-05
1.87	1.483	3.5e-05
1.88	1.483	3.37e-05
1.89	1.483	3.41e-05
1.9	1.483	3.46e-05
1.91	1.483	3.46e-05
1.92	1.483	3.47e-05
1.93	1.483	3.55e-05
1.94	1.483	3.62e-05
1.95	1.483	3.55e-05
1.96	1.483	3.45e-05
1.97	1.483	3.39e-05
1.98	1.483	3.39e-05
1.99	1.483	3.47e-05
2.0	1.483	3.61e-05
2.01	1.483	3.66e-05
2.02	1.483	3.57e-05
2.03	1.483	3.46e-05
2.04	1.483	3.45e-05
2.05	1.483	3.46e-05
2.06	1.483	3.43e-05
2.07	1.483	3.38e-05
2.08	1.483	3.38e-05
2.09	1.483	3.53e-05
2.1	1.483	3.74e-05
2.11	1.483	3.9e-05
2.12	1.483	4.15e-05
2.13	1.483	4.72e-05
2.14	1.483	5.1e-05
2.15	1.483	4.54e-05
2.16	1.483	4.1e-05
2.17	1.483	4.01e-05
2.18	1.483	4.02e-05
2.19	1.483	4.13e-05
2.2	1.483	4.4e-05
2.21	1.483	4.99e-05
2.22	1.483	5.81e-05
2.23	1.483	7.19e-05
2.24	1.483	9.01e-05
2.25	1.483	0.000157
2.26	1.483	0.000211
2.27	1.483	0.00027
2.28	1.483	0.000359
2.29	1.483	0.000518
2.3	1.483	0.000734
2.31	1.483	0.000812
2.32	1.483	0.000654
2.33	1.483	0.000595
2.34	1.483	0.000669
2.35	1.483	0.000758
2.36	1.483	0.000735
2.37	1.483	0.000706
2.38	1.483	0.000747
2.39	1.483	0.000756
2.4	1.483	0.00075
2.41	1.483	0.000714
2.42	1.483	0.000684
2.43	1.483	0.000663
2.44	1.483	0.000621
2.45	1.483	0.000578
2.46	1.483	0.000533
2.47	1.483	0.000503
2.48	1.483	0.000465
2.49	1.483	0.000445
2.5	1.483	0.000419

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