Impact of surface plasmon polaritons on photorefractive effect in dye doped liquid crystal cells with ZnSe interlayers

• DOI: 10.1364/oe.22.020964
• Publication Date: 2014-08-21T17:17:00Z
• Authors: Tingyu Xue; Hua Zhao; Cuiling Meng; Jiayin Fu; Jingwen Zhang
• Keywords: 02 engineering and technology; 0210 nano-technology

Great impact of surface plasmon polaritons (SPPs) on photorefractive effect in ZnSe/liquid crystal interface was observed and studied dye pyrromethane 597 doped 4,4'-n-pentylcyanobiphenyl (5CB) liquid (LC) cells sandwiched with ZnSe coated ITO glass plates. Locally electrostatic modification charge carrier density makes possible visible light excitation SPPs the LC/ZnSe interfaces. A tentative physical picture SPP mediation proposed elucidating associated findings, including photoinduced scattering enhancement at low electric field then reduction high field, stepwise up- down-turns exponential gain coefficient, 2D diffraction patterns. This work may open a new way toward tunable low-loss for plasmonic applications, specifically organic plasmonics.