High-speed phenomena in photonic materials and optical bistability : ECO3, 12-14 March 1990, the Hague, the Netherlands - Jäger, D. (Dieter); European Congress on Optics; European Physical Society; European Federation for Applied Optics; Society of Photo-optical Instrumentation Engineers; Association nationale de la recherche technique (Proceedings / SPIE -- the International Society for Optical Engineering, 1990)