Non-Markovian polariton dynamics in organic strong coupling Antoine Canaguier-Durand, Cyriaque Genet, Astrid Lambrecht, Thomas W. Ebbesen and Serge Reynaud Eur. Phys. J. D, 69 1 (2015) 24 Published online: 21 January 2015 DOI: 10.1140/epjd/e2014-50539-x