Optical constants

Refractive index of GaSb (Gallium antimonide)

Ferrini et al. 1998: n,k 0.207–2.48 µm

Data: tabulated nk
Range: 0.207–2.48 µm
Points: 56
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 4.61523
Extinction coefficient k: 1.83626

Permittivity ε₁: 17.9285
Permittivity ε₂: 16.9495

Absorption coefficient α: 392702 cm⁻¹
Penetration depth δ = λ/(2πk): 50.9293 nm

Abbe number V_d: —
Chromatic dispersion dn/dλ: 6.15385 µm⁻¹

Group index n_g: 0.999231
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

# GaSb (Gallium antimonide): Ferrini et al. 1998: n,k 0.207–2.48 µm
gasb = ls.fetch_refractiveindex("main", "GaSb", "Ferrini", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(gasb.range_nm)  # (207, 2480) nm
eps = gasb.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_9f178664e4a7/lightsmith"
gasb = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(gasb.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (gasb/ferrini-1998).

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

Al_xGa_1−xSb, x = 0 (GaAs). Thin film grown by molecular beam epitaxy on a GaSb substrate.

References

R. Ferrini, M. Patrini, S. Franchi. Optical functions from 0.02 to 6 eV of Al_xGa_1−xSb/GaSb epitaxial layers. J. Appl Phys. 84, 4517-4524 (1998)

doi:10.1063/1.368677 Optical functions from 0.02 to 6 eV of AlxGa1−xSb/GaSb epitaxial layers, Journal of Applied Physics (1998)

Cite

R. Ferrini, M. Patrini and S. Franchi. Optical functions from 0.02 to 6 eV of AlxGa1−xSb/GaSb epitaxial layers. Journal of Applied Physics, 84, 4517-4524 (1998), doi:10.1063/1.368677; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

56 rows as published

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

GaSb (Gallium antimonide), Ferrini et al. 1998: n,k 0.207–2.48 µm: n and k versus wavelength
λ (µm)	n	k
0.207	0.956	2.45
0.21	1.01	2.475
0.214	1.046	2.51
0.218	1.084	2.56
0.221	1.144	2.619
0.225	1.228	2.659
0.23	1.309	2.663
0.234	1.354	2.648
0.238	1.363	2.651
0.243	1.361	2.688
0.248	1.368	2.749
0.253	1.382	2.825
0.258	1.4	2.921
0.264	1.432	3.043
0.27	1.483	3.19
0.276	1.561	3.369
0.282	1.689	3.604
0.288	1.944	3.872
0.295	2.415	4.078
0.302	2.956	3.992
0.31	3.323	3.708
0.318	3.528	3.415
0.326	3.642	3.163
0.335	3.713	2.964
0.344	3.759	2.778
0.354	3.783	2.623
0.365	3.804	2.5
0.376	3.823	2.378
0.387	3.825	2.253
0.4	3.785	2.16
0.413	3.751	2.119
0.428	3.74	2.116
0.443	3.755	2.148
0.459	3.816	2.19
0.477	3.946	2.268
0.496	4.235	2.289
0.517	4.464	2.0
0.539	4.455	1.812
0.564	4.47	1.77
0.59	4.63	1.843
0.62	5.197	1.465
0.653	5.037	0.881
0.689	4.822	0.647
0.729	4.644	0.514
0.775	4.5	0.407
0.827	4.37	0.338
0.886	4.27	0.299
0.954	4.2	0.268
1.033	4.14	0.225
1.127	4.096	0.201
1.24	4.05	0.173
1.378	4.026	0.145
1.55	4.01	0.125
1.771	3.959	0.023
2.066	3.878	0.0
2.48	3.846	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: —

GaSb (Gallium antimonide): all datasets

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About GaSb (Gallium antimonide)

Gallium antimonide (GaSb) is a III-V compound semiconductor with a direct band gap of approximately 0.72 eV. It is well-suited for infrared (IR) applications, particularly in the mid- to long-wavelength IR range. Due to its narrow band gap, GaSb is often employed in optoelectronic devices like photodetectors, laser diodes, and infrared-emitting diodes. It also serves as a substrate for other III-V semiconductors like InAs and InSb, facilitating the creation of complex heterostructures with tailored electronic and optical properties. Gallium antimonide is known for its high electron mobility, making it appealing for high-speed electronic applications as well. Overall, GaSb is a versatile material with growing significance in advanced optoelectronic and electronic technologies.

More about GaSb (Gallium antimonide) →

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Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/other/semiconductor alloys/AlSb-GaSb/nk/Ferrini-0.yml
ID: ds_9f178664e4a7
API: /v1/datasets/ds_9f178664e4a7

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