Observation of nonlinear dispersion of surface electromagnetic waves excited in a prism-metal-plate-nematic-liquid-crystal system Arakelyan, S. M. ; Grigoryan, G. L. ; Kocharyan, L. M. ; Nersisyan, S. Ts. ; Chilingaryan, Yu. S. Abstract Publication: Optics and Spectroscopy Pub Date: May 1987 Bibcode: 1987OptSp..62..641A