Optical constants of He (Helium)
Ermolov et al. 2015: n 0.09–1.00 µm
Wavelength:
µm
(0.09–1)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{2.16463842\text{×}10^{-05}λ^2}{λ^2+6.80769781\text{×}10^{-04}}+\frac{2.10561127\text{×}10^{-07}λ^2}{λ^2-5.13251289\text{×}10^{-03}}+\frac{4.75092720\text{×}10^{-05}λ^2}{λ^2-3.18621354\text{×}10^{-03}}$$Conditions & Spec sheet
n_absolute: true temperature: 0 ℃ pressure: 101325 Pa
Comments
Standard conditions. 0 ℃, 760 torr (101.325 kPa).
References
A. Ermolov, K. F. Mak, M. H. Frosz, J. C. Travers, P. St. J. Russell, Supercontinuum generation in the vacuum ultraviolet through dispersive-wave and soliton-plasma interaction in a noble-gas-filled hollow-core photonic crystal fiber, Phys. Rev. A 92, 033821 (2015)