Waveguiding Properties Of Perylene Microcrystals Synthesized By Retarding The Growth Along The Pi-Stack Direction

Selective, hard to realize growth retardation of the pi-stacking direction over the edge-packing direction has been achieved in perylene microcrystals using an aryl amphiphile. The perylene microcrystals grow predominantly along the edge-packing direction resulting in novel and hitherto unknown perylene square rods. The rods show exciton-polariton waveguiding along the rod axis even though it corresponds to pure edge-packing of the molecules, which is unprecedented in organic microcrystals.