Beam shaping by a layered structure with left-handed materials
  We analyze transmission of a layered photonic structure (a one-dimensional photonic crystal) consisting of alternating slabs of two materials with positive and negative refractive index. For the periodic structure with zero averaged refractive index, we demonstrate a number of unique properties of the beam transmission observed in strong beam modification and reshaping. 
Ilya V. Shadrivov, Andrey A. Sukhorukov, and Yuri S. Kivshar