A physically admissible parameterization for differential Mueller matrix of uniform media
Résumé
In this letter, we address the question of physical validity of differential Mueller matrix. A new parameterization of entries of this differential matrix is proposed. It ensures that the generators associated to depolarization terms lead to physical Mueller matrices as for the nondepolarizing terms. A general expression for the depolarizing part of the differential matrix is found and a way to compute the non-linear relations between the parameters is proposed.