Large negative lateral shifts due to negative refraction
  When a thin structure in which negative refraction occurs (a metallo-dielectric or a photonic crystal) is illuminated by a beam, the reflected and transmitted beam can undergo a large negative lateral shift. This phenomenon can be seen as an interferential enhancement of the geometrical shift and can be considered as a signature of negative refraction. 
Jessica Benedicto (LASMEA), R\'emi Poll\`es (LASMEA), Antoine Moreau   (LASMEA), Emmanuel Centeno (LASMEA)
physics.optics