Optical constants

Refractive index of MoSe₂ (Molybdenum diselenide)

Beal and Huges 1979: n,k 0.044–1.16 µm

Data: tabulated nk
Range: 0.04387–1.161 µm
Points: 100
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 4.92055
Extinction coefficient k: 1.45312

Permittivity ε₁: 22.1002
Permittivity ε₂: 14.3003

Absorption coefficient α: 310764 cm⁻¹
Penetration depth δ = λ/(2πk): 64.3575 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: -2.47788 µm⁻¹

Group index n_g: 6.37655
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

# MoSe2 (Molybdenum diselenide): Beal and Huges 1979: n,k 0.044–1.16 µm
mose2 = ls.fetch_refractiveindex("main", "MoSe2", "Beal", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(mose2.range_nm)  # (43.87, 1161) nm
eps = mose2.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_2edd7e47387a/lightsmith"
mose2 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(mose2.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (mose2/beal-huges-1979).

# ... load mose2 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=mose2)],
    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.

References

A. R. Beal and H. P. Huges. Kramers-Kronig analysis of the reflectivity spectra of 2H-MoS₂, 2H-MoSe₂, and 2H-MoTe₂. J. Phys. C 12, 881 (1979)

doi:10.1088/0022-3719/12/5/017 Kramers-Kronig analysis of the reflectivity spectra of 2H-MoS 2 , 2H-MoSe 2 and 2H-MoTe 2, Journal of Physics C: Solid State Physics (1979)

Cite

A R Beal and H P Hughes. Kramers-Kronig analysis of the reflectivity spectra of 2H-MoS 2 , 2H-MoSe 2 and 2H-MoTe 2. Journal of Physics C: Solid State Physics, 12, 881-890 (1979), doi:10.1088/0022-3719/12/5/017; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

100 rows as published

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

MoSe2 (Molybdenum diselenide), Beal and Huges 1979: n,k 0.044–1.16 µm: n and k versus wavelength
λ (µm)	n	k
0.04387	0.6836	0.1856
0.05515	0.5662	0.3514
0.06643	0.5705	0.7109
0.07771	0.6754	0.9288
0.08899	0.7897	1.083
0.1003	0.9104	1.284
0.1116	1.19	1.439
0.1228	1.449	1.311
0.1341	1.486	1.094
0.1454	1.348	0.9137
0.1567	0.9456	1.098
0.168	0.9233	1.488
0.1792	1.063	1.743
0.1905	1.191	1.9
0.2018	1.312	2.038
0.2131	1.452	2.18
0.2244	1.604	2.305
0.2357	1.758	2.34
0.2469	1.9	2.374
0.2582	2.01	2.43
0.2695	2.111	2.492
0.2808	2.237	2.536
0.2921	2.431	2.609
0.3033	2.573	2.637
0.3146	2.765	2.504
0.3259	2.815	2.432
0.3372	2.825	2.382
0.3485	2.787	2.365
0.3597	2.755	2.445
0.371	2.819	2.615
0.3823	2.917	2.752
0.3936	3.071	2.903
0.4049	3.259	2.974
0.4162	3.473	3.076
0.4274	3.811	2.95
0.4387	3.993	2.898
0.45	4.127	2.806
0.4613	4.23	2.708
0.4726	4.336	2.613
0.4838	4.443	2.521
0.4951	4.533	2.421
0.5064	4.619	2.323
0.5177	4.705	2.223
0.529	4.782	2.108
0.5403	4.848	2.001
0.5515	4.908	1.872
0.5628	4.918	1.699
0.5741	4.94	1.568
0.5854	4.926	1.465
0.5967	4.898	1.404
0.6079	4.869	1.342
0.6192	4.832	1.282
0.6305	4.802	1.248
0.6418	4.772	1.214
0.6531	4.741	1.18
0.6644	4.719	1.181
0.6756	4.71	1.234
0.6869	4.81	1.259
0.6982	4.94	1.236
0.7095	5.009	1.075
0.7208	4.978	0.9804
0.732	4.947	0.8852
0.7433	4.889	0.8568
0.7546	4.827	0.8284
0.7659	4.786	0.859
0.7772	4.766	0.9429
0.7884	4.787	1.048
0.7997	4.993	1.158
0.811	5.246	1.013
0.8223	5.408	0.6857
0.8336	5.467	0.4406
0.8449	5.391	0.3316
0.8561	5.318	0.2698
0.8674	5.11	0.2118
0.8787	5.008	0.1468
0.89	4.905	0.07925
0.9013	4.823	0.008703
0.9125	4.746	0.0
0.9238	4.67	0.0
0.9351	4.641	0.0
0.9464	4.611	0.0
0.9577	4.581	0.0
0.969	4.551	0.0
0.9802	4.52	0.0
0.9915	4.49	0.0
1.003	4.461	0.0
1.014	4.446	0.0
1.025	4.432	0.0
1.037	4.418	0.0
1.048	4.404	0.0
1.059	4.389	0.0
1.07	4.375	5.504e-05
1.082	4.36	0.000268
1.093	4.346	0.0004823
1.104	4.332	0.000698
1.116	4.318	0.0009152
1.127	4.303	0.001134
1.138	4.289	0.001354
1.149	4.275	0.001575
1.161	4.26	0.001798

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: —

MoSe₂ (Molybdenum diselenide): all datasets

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About MoSe2 (Molybdenum diselenide)

Molybdenum diselenide (MoSe₂) is a layered compound similar in structure to molybdenum disulfide (MoS₂). Each layer consists of a plane of molybdenum atoms sandwiched between two planes of selenium atoms. These layers are held together by weak van der Waals forces, allowing them to be easily exfoliated. In its bulk form, MoSe₂ behaves as an indirect bandgap semiconductor. However, when reduced to a monolayer, its properties shift, and it becomes a direct bandgap semiconductor. This transition in electronic properties has attracted considerable interest in the fields of optoelectronics and nanotechnology. Potential applications include use in transistors, photodetectors, and other electronic or optoelectronic devices, especially when high-quality thin films or single layers are employed.

More about MoSe2 (Molybdenum diselenide) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/main/MoSe2/nk/Beal.yml
ID: ds_2edd7e47387a
API: /v1/datasets/ds_2edd7e47387a

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