Authors: Steffen Weimann; Armando Perez-Leija; Maxime Lebugle; Robert Keil; Malte Tichy; Markus Gräfe; René Heilmann; Stefan Nolte; Hector Moya-Cessa; Gregor Weihs; Demetrios N Christodoulides; Alexander Szameit Journal: Nat Commun Date: 2016-03-23 Impact factor: 14.919