DETAILS, FICTION AND MAGNETO-OPTICAL CRYSTAL

各向异性透明晶体如方解石、石英等的折射率，是其固有的特性，称为永久双折射。If the electric field has the route of your optical axis, a person obtains the remarkable index ne. This is achievable only if the propagation path (a lot more precisely, the way of your k vector) is perpendicular on the optical axis. For