Signal enhancement of magneto-optical Kerr effect measurements by weak value amplification

Magneto-optic effects are widely applied in the analysis of magnetic thin films. Specifically, due to its local probing characteristic, sensitivity, and experimental simplicity, the surface magneto-optic Kerr effect has been shown to be very useful in the investigation of the magnetization structure of materials. In this work, we propose a weak measurement-based protocol to enhance the pointer deflection, namely the polarization rotation of an incident light beam upon reflection from a magnetic surface, in some orders of magnitude, without loss in precision. It could provide a new insight into magnetic research.