pub fn real_refractive_indices(epsilon: f64, mu: f64, kappa: f64) -> [f64; 2]Expand description
Negative- and positive-helicity refractive indices sqrt(epsilon mu) -+ kappa of a
real material.
A negative product epsilon mu gives NaN, as numpy.sqrt of a negative float does.
Complex materials use Material::indices.
Upstream: treams.misc.refractive_index with real arguments.