Optical constants

Refractive index of Te (Tellurium)

Guo et al. 2022: n,k(e) 0.400–0.900 µm

Data: tabulated nk
Range: 0.4–0.9 µm
Points: 102
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: 1.85476
Extinction coefficient k: 3.72751

Permittivity ε₁: -10.4542
Permittivity ε₂: 13.8272

Absorption coefficient α: 797163 cm⁻¹
Penetration depth δ = λ/(2πk): 25.089 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: 7.81 µm⁻¹

Group index n_g: -2.7344
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

# Te (Tellurium): Guo et al. 2022: n,k(e) 0.400–0.900 µm
te = ls.fetch_refractiveindex("main", "Te", "Guo-e", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(te.range_nm)  # (400, 900) nm
eps = te.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_9efe351cb6ca/lightsmith"
te = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(te.source)  # citation and provenance travel with the data

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

# ... load te as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=te)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=900, 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

Tellurene. Extraordinary ray (e).

Conditions

direction: e

References

Z. Guo, H. Gu, M. Fang, L. Yed, S. Liu. Giant in-plane optical and electronic anisotropy of tellurene: a quantitative exploration. Nanoscale, 14, 12238–12246 (2022) (Numerical data kindly provided by Zhengfeng Guo)

doi:10.1039/d2nr03226k Giant in-plane optical and electronic anisotropy of tellurene: a quantitative exploration, Nanoscale (2022)

Cite

Zhengfeng Guo, Honggang Gu, Mingsheng Fang, Lei Ye and Shiyuan Liu. Giant in-plane optical and electronic anisotropy of tellurene: a quantitative exploration. Nanoscale, 14, 12238-12246 (2022), doi:10.1039/d2nr03226k; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

102 rows as published

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

Te (Tellurium), Guo et al. 2022: n,k(e) 0.400–0.900 µm: n and k versus wavelength
λ (µm)	n	k
0.4	0.85284	2.54422
0.405	0.87113	2.57785
0.41	0.88972	2.61141
0.415	0.90859	2.64492
0.42	0.92778	2.67837
0.425	0.94728	2.71177
0.43	0.96711	2.74513
0.435	0.98729	2.77844
0.44	1.00781	2.8117
0.445	1.02871	2.84492
0.45	1.04999	2.87809
0.455	1.07168	2.9112
0.46	1.09377	2.94427
0.465	1.1163	2.97728
0.47	1.13927	3.01023
0.475	1.16272	3.04311
0.48	1.18664	3.07591
0.485	1.21107	3.10863
0.49	1.23602	3.14125
0.495	1.26152	3.17377
0.5	1.28757	3.20616
0.505	1.31421	3.23842
0.51	1.34144	3.27052
0.515	1.3693	3.30245
0.52	1.3978	3.33418
0.525	1.42696	3.36569
0.53	1.45681	3.39696
0.532	1.46955	3.41001
0.535	1.48735	3.42795
0.54	1.51861	3.45863
0.545	1.5506	3.48897
0.55	1.58335	3.51893
0.555	1.61686	3.54847
0.56	1.65114	3.57755
0.565	1.68621	3.60612
0.57	1.72208	3.63414
0.575	1.75874	3.66156
0.58	1.7962	3.68832
0.585	1.83445	3.71437
0.59	1.8735	3.73964
0.595	1.91332	3.76409
0.6	1.9539	3.78764
0.605	1.99522	3.81024
0.61	2.03726	3.83182
0.615	2.07997	3.85232
0.62	2.12333	3.87168
0.625	2.16728	3.88984
0.63	2.21178	3.90673
0.635	2.25676	3.9223
0.64	2.30216	3.93649
0.645	2.34791	3.94925
0.65	2.39393	3.96054
0.655	2.44013	3.97032
0.66	2.48644	3.97856
0.665	2.53275	3.98522
0.67	2.57897	3.9903
0.675	2.62499	3.99377
0.68	2.67072	3.99565
0.685	2.71606	3.99594
0.69	2.76089	3.99466
0.695	2.80512	3.99184
0.7	2.84865	3.98751
0.705	2.89138	3.98172
0.71	2.93321	3.97454
0.715	2.97407	3.96601
0.72	3.01387	3.95621
0.725	3.05254	3.94523
0.73	3.09001	3.93314
0.735	3.12623	3.92003
0.74	3.16115	3.90599
0.745	3.19472	3.89113
0.75	3.22693	3.87553
0.755	3.25774	3.8593
0.76	3.28715	3.84252
0.765	3.31515	3.8253
0.77	3.34174	3.80773
0.775	3.36694	3.78989
0.78	3.39077	3.77188
0.785	3.41324	3.75378
0.79	3.4344	3.73566
0.795	3.45426	3.71759
0.8	3.47288	3.69965
0.805	3.4903	3.6819
0.81	3.50655	3.66439
0.815	3.5217	3.64718
0.82	3.53578	3.63031
0.825	3.54885	3.61382
0.83	3.56096	3.59775
0.835	3.57216	3.58214
0.84	3.5825	3.56699
0.845	3.59204	3.55235
0.85	3.60081	3.53823
0.855	3.60888	3.52464
0.86	3.61629	3.5116
0.865	3.62308	3.4991
0.87	3.6293	3.48717
0.875	3.63499	3.47579
0.88	3.64019	3.46498
0.885	3.64494	3.45473
0.89	3.64929	3.44503
0.895	3.65325	3.43588
0.9	3.65688	3.42728

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: —

Te (Tellurium): all datasets

Crystal

Thin film

Ciesielski et al. 2018: 30-nm film; n,k 0.2–2 µm n,k 0.2–2 µm

Tellurium (2D Te)

About Te (Tellurium)

Tellurium (Te) is a relatively rare, brittle, and silver-white metalloid with a crystalline structure. It is found naturally in the Earth's crust and is primarily obtained as a byproduct of the refining of copper ores. Tellurium has the unique property of being more conductive in certain directions, which can be valuable in specific electronic applications. Its compounds, especially with metals like cadmium (CdTe), are used in semiconductors and solar cells. Moreover, binary alloys of tellurium with bismuth, lead, and other metals have been studied for their thermoelectric properties, which can convert heat directly into electricity. The photoconductivity of tellurium also makes it valuable in some photovoltaic applications. Another noteworthy application of tellurium is in the rewritable optical discs (DVD-RW, Blu-ray), where it's used in the form of an alloy with antimony.

More about Te (Tellurium) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/main/Te/nk/Guo-e.yml
ID: ds_9efe351cb6ca
API: /v1/datasets/ds_9efe351cb6ca

Plot