Optical constants
Refractive index of C2H4(OH)2 (Ethylene glycol)
Otanicar 2009: k 0.2–1.5 µm
- Data
- tabulated k
- Range
- 0.2–1.5 µm
- Points
- 66
- Temperature
- 298 K
- Licence
- CC0-1.0
Plot
Click the plot to set the calculator wavelength. Note: the source gives k only; n is not available.
At one wavelength
- Refractive index n
- —
- Extinction coefficient k
- 2.62080e-08
- Permittivity ε1
- —
- Permittivity ε2
- —
- Absorption coefficient α
- 0.00560482 cm⁻¹
- Penetration depth δ = λ/(2πk)
- 3.56835e+09 nm
- Abbe number Vd
- —
- Chromatic dispersion dn/dλ
- — µm⁻¹
- Group index ng
- —
- Group velocity dispersion
- — fs²/mm
- Dispersion parameter D
- — ps/(nm·km)
- Photon energy
- 2.11001 eV
ε = (n + ik)², α = 4πk/λ, ng = 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
This dataset has k only, so it cannot be used as a simulation material by itself. Pick a dataset with n from the list above.
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
Conditions
- temperature
- 298 K
- the source gives k only; n is not available
References
- doi:10.1016/j.solener.2008.12.009 Optical properties of liquids for direct absorption solar thermal energy systems, Solar Energy (2009)
Cite
Todd P. Otanicar, Patrick E. Phelan and Jay S. Golden. Optical properties of liquids for direct absorption solar thermal energy systems. Solar Energy, 83, 969-977 (2009), doi:10.1016/j.solener.2008.12.009; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)
Data
66 rows as published| λ (µm) | k |
|---|---|
| 0.2 | 1.56e-05 |
| 0.22 | 6.99e-07 |
| 0.24 | 2.88e-07 |
| 0.26 | 2.05e-07 |
| 0.28 | 9.13e-08 |
| 0.3 | 4.73e-08 |
| 0.32 | 4.01e-08 |
| 0.34 | 3.33e-08 |
| 0.36 | 2.82e-08 |
| 0.38 | 2.4e-08 |
| 0.4 | 2.06e-08 |
| 0.42 | 2.05e-08 |
| 0.44 | 1.97e-08 |
| 0.46 | 2.12e-08 |
| 0.48 | 2.25e-08 |
| 0.5 | 2.35e-08 |
| 0.52 | 2.42e-08 |
| 0.54 | 2.52e-08 |
| 0.56 | 2.55e-08 |
| 0.58 | 2.56e-08 |
| 0.6 | 2.72e-08 |
| 0.62 | 3.13e-08 |
| 0.64 | 3.7e-08 |
| 0.66 | 3.42e-08 |
| 0.68 | 3.65e-08 |
| 0.7 | 4.05e-08 |
| 0.72 | 5.39e-08 |
| 0.74 | 1.03e-07 |
| 0.76 | 1.65e-07 |
| 0.78 | 1.6e-07 |
| 0.8 | 1.6e-07 |
| 0.82 | 1.65e-07 |
| 0.84 | 7.63e-08 |
| 0.86 | 8.79e-08 |
| 0.88 | 1.54e-07 |
| 0.9 | 3.98e-07 |
| 0.92 | 8.48e-07 |
| 0.94 | 7.17e-07 |
| 0.96 | 5.55e-07 |
| 0.98 | 1.3e-06 |
| 1.0 | 1.72e-06 |
| 1.02 | 1.82e-06 |
| 1.04 | 1.73e-06 |
| 1.06 | 1.62e-06 |
| 1.08 | 1.42e-06 |
| 1.1 | 1.19e-06 |
| 1.12 | 9.96e-07 |
| 1.14 | 1.34e-06 |
| 1.16 | 3.16e-06 |
| 1.18 | 6.57e-06 |
| 1.2 | 1.2e-05 |
| 1.22 | 1.13e-05 |
| 1.24 | 7.46e-06 |
| 1.26 | 6.39e-06 |
| 1.28 | 5.64e-06 |
| 1.3 | 4.66e-06 |
| 1.32 | 4.77e-06 |
| 1.34 | 6.57e-06 |
| 1.36 | 1.12e-05 |
| 1.38 | 1.64e-05 |
| 1.4 | 2.05e-05 |
| 1.42 | 4.68e-05 |
| 1.44 | 7.8e-05 |
| 1.46 | 9.67e-05 |
| 1.48 | 0.000109 |
| 1.5 | 0.000115 |
25 °C