Reflection of OH molecules from magnetic mirrors
  We have reflected a Stark-decelerated beam of OH molecules under normal incidence from mirrors consisting of permanent magnets. Two different types of magnetic mirrors have been demonstrated. A long-range flat mirror made from a large disc magnet has been used to spatially focus the reflected beam in the longitudinal direction ("bunching"). A short-range curved mirror composed of an array of small cube magnets allows for transverse focusing of the reflected beam. 
Markus Metsala, Joop J. Gilijamse, Steven Hoekstra, Sebastiaan Y. T.   van de Meerakker, and Gerard Meijer