  Spin-orbit interactions are subwavelength phenomena which can potentially
lead to numerous device related applications in nanophotonics. Here, we report
Spin-Hall effect in the forward scattering of Hermite-Gaussian and Gaussian
beams from a plasmonic nanowire. Asymmetric scattered radiation distribution
was observed for circularly polarized beams. Asymmetry in the scattered
radiation distribution changes the sign when the polarization handedness
inverts. We found a significant enhancement in the Spin-Hall effect for
Hermite-Gaussian beam as compared to Gaussian beam for constant input power.
The difference between scattered powers perpendicular to the long axis of the
plasmonic nanowire was used to quantify the enhancement. In addition to it,
nodal line of HG beam acts as the marker for the Spin-Hall shift. Numerical
calculations corroborate experimental observations and suggest that the Spin
flow component of Poynting vector associated with the circular polarization is
responsible for the Spin-Hall effect and its enhancement.
