Goos-H\"anchen and Imbert-Fedorov shifts for paraxial X-Waves
  We present a theoretical analysis for the \GH and \IF shifts experienced by an X-wave upon reflection from a dielectric interface. We show that the temporal chirp, as well as the bandwidth of the X-wave directly affect the spatial shifts in a way that can be experimentally observed, while the angular shifts do not depend on the spectral features of the X-Wave. A dependence of the spatial shifts on the spatial structure of the X-wave is also discussed. 
Marco Ornigotti, Andrea Aiello and Claudio Conti
physics.optics