Magnetic Field Effects on Coherent Backscattering in case of Mie Scattering

Ralk Lenke, University of Konstanz, Germany

Magneto-optical Faraday Rotation is the only effect which destroys the coherent backscattering enhancement (CBE) of quasi-elastically multiple scattered light. However, especially for Mie scattering, also other effects have been predicted like a shift of the CB-cone off the exact backscattering direction in case of circular polarized light or the appearance of a twin peak in case of linear polarization. We have observed these effects experimentally for the first time. Moreover, we have observed an unexpected transversal asymmetry in the backscattered intensity, i.e. an asymmetric photon flux perpendicular to the external magnetic field and perpendicular to the incident light.