Authors: George C Knee; Stephanie Simmons; Erik M Gauger; John J L Morton; Helge Riemann; Nikolai V Abrosimov; Peter Becker; Hans-Joachim Pohl; Kohei M Itoh; Mike L W Thewalt; G Andrew D Briggs; Simon C Benjamin Journal: Nat Commun Date: 2012-01-03 Impact factor: 14.919