Spin separations of light at the air–glass interface for femtosecond laser pulses

Abstract

We theoretically and experimentally study the spin separations of femtosecond laser pulses reflected from an air–glass interface. Due to the broad spectral bandwidths, the displacements induced by the spin Hall effect of light and the in-plane spin separation of light are dependent on the pulse durations. Their lower frequency components acquire larger separations. To accurately measure the separations, the intensity distribution of the pulses and the spectral responsivity of the detector should be taken into account.