Optical constants

Refractive index of CHBr₃ (Bromoform)

Ghosal et al. 1993: n 1–13 µm

Data: tabulated n
Range: 1–13 µm
Points: 136
Temperature: 298 K
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.5721
Extinction coefficient k: 0

Permittivity ε₁: 2.4715
Permittivity ε₂: 0

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

Abbe number V_d: —
Chromatic dispersion dn/dλ: 0.01 µm⁻¹

Group index n_g: 1.536
Group velocity dispersion: — fs²/mm

Dispersion parameter D: — ps/(nm·km)
Photon energy: 0.343447 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

# CHBr3 (Bromoform): Ghosal et al. 1993: n 1–13 µm
chbr3 = ls.fetch_refractiveindex("organic", "bromoform", "Ghosal", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(chbr3.range_nm)  # (1000, 13000) nm
eps = chbr3.eps([3610])  # 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_252ce554eba1/lightsmith"
chbr3 = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(chbr3.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (bromoform/ghosal-1993).

# ... load chbr3 as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=chbr3)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=1000, stop_nm=13000, 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

298 K (25 °C)

Conditions

temperature: 298 K

References

S. Ghosal, J. L. Ebert, and S. A. Self. The infrared refractive indices of CHBr₃, CCl₄ and CS₂. IR Physics 34, 621-628 (1993)

doi:10.1016/0020-0891(93)90120-v The infrared refractive indices of CHBr3, CCl4 and CS2, Infrared Physics (1993)

Cite

Sarbajit Ghosal, Jon L. Ebert and Sidney A. Self. The infrared refractive indices of CHBr3, CCl4 and CS2. Infrared Physics, 34, 621-628 (1993), doi:10.1016/0020-0891(93)90120-v; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

136 rows as published

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

CHBr3 (Bromoform), Ghosal et al. 1993: n 1–13 µm: n and k versus wavelength
λ (µm)	n
1.0	1.584
1.1	1.583
1.2	1.581
1.3	1.582
1.4	1.581
1.5	1.579
1.6	1.58
1.7	1.576
1.8	1.577
1.9	1.573
2.0	1.578
2.1	1.578
2.2	1.577
2.3	1.576
2.4	1.572
2.5	1.573
2.6	1.571
2.7	1.573
2.8	1.573
3.0	1.573
3.1	1.575
3.2	1.574
3.25	1.572
3.27	1.569
3.275	1.567
3.29	1.566
3.3	1.565
3.31	1.56
3.32	1.571
3.325	1.583
3.33	1.587
3.35	1.582
3.4	1.573
3.5	1.572
3.6	1.572
3.7	1.573
3.8	1.572
3.9	1.573
4.0	1.572
4.1	1.57
4.4	1.569
4.5	1.571
4.6	1.571
4.7	1.569
4.8	1.569
5.0	1.568
5.2	1.564
5.4	1.566
5.5	1.566
5.6	1.565
5.7	1.564
5.8	1.564
6.0	1.565
6.2	1.564
6.25	1.567
6.3	1.565
6.4	1.563
6.45	1.568
6.6	1.564
6.7	1.564
6.9	1.558
7.0	1.564
7.1	1.557
7.2	1.56
7.3	1.562
7.4	1.559
7.5	1.557
7.6	1.559
7.7	1.557
7.8	1.558
7.9	1.556
8.0	1.553
8.1	1.551
8.2	1.548
8.3	1.546
8.4	1.54
8.45	1.536
8.5	1.528
8.55	1.52
8.6	1.505
8.65	1.478
8.7	1.434
8.75	1.458
8.76	1.488
8.78	1.567
8.8	1.649
8.82	1.703
8.84	1.72
8.85	1.719
8.86	1.71
8.9	1.668
8.95	1.635
9.0	1.617
9.1	1.592
9.2	1.584
9.3	1.577
9.4	1.573
9.5	1.569
9.6	1.568
9.7	1.565
9.8	1.564
9.9	1.561
10.0	1.565
10.1	1.565
10.2	1.563
10.3	1.562
10.4	1.56
10.5	1.559
10.6	1.559
10.7	1.557
10.75	1.556
10.8	1.558
10.85	1.554
10.9	1.554
11.0	1.556
11.1	1.55
11.15	1.548
11.2	1.549
11.3	1.544
11.4	1.544
11.5	1.543
11.6	1.543
11.7	1.542
11.8	1.542
11.9	1.54
12.0	1.539
12.1	1.537
12.2	1.532
12.3	1.53
12.4	1.527
12.5	1.526
12.6	1.524
12.7	1.526
12.8	1.522
12.9	1.516
13.0	1.509

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: —

CHBr₃ (Bromoform): all datasets

Ghosal et al. 1993: n 1–13 µm n 1–13 µm default

About CHBr3 (Bromoform)

Bromoform (CHBr₃) is a dense, colorless to pale-yellow liquid that has a high refractive index and emits a sweet odor similar to that of chloroform. It is one of the trihalomethanes, with three bromine atoms attached to a central carbon atom. Historically, bromoform was used as a solvent, sedative, and flame retardant, but due to its potential health risks and environmental concerns, its use has been largely restricted in many countries. It can be produced as a byproduct during the chlorination of drinking water that contains bromide ions. Exposure to bromoform can be harmful, and it has been classified as a possible human carcinogen based on animal studies.

More about CHBr3 (Bromoform) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/CHBr3 - bromoform/nk/Ghosal.yml
ID: ds_252ce554eba1
API: /v1/datasets/ds_252ce554eba1

Plot