纳米银掺杂的高效率全息聚合物分散液晶光栅制备

报道了一种基于掺杂纳米银聚合物分散液晶(PDLC)材料的高衍射率全息电控光栅的制备及特性。通过在原有聚合物分散液晶材料体系中添加适量的纳米银颗粒以制备体全息光栅,实验研究了掺杂不同质量比的纳米银颗粒对全息聚合物分散液晶(H-PDLC)体光栅的衍射效率、驱动阈值电压、响应时间的影响。实验结果表明,通过掺杂纳米银材料,能够优化聚合物和液晶两相分离结构,使聚合物与液晶分离更加彻底,显著提高H-PDLC体光栅的一级衍射效率,同时能改善体光栅的电光特性,缩短响应时间。初步分析表明,由于纳米银颗粒的表面等离子体效应和体系折射率匹配的优化改善了H-PDLC光栅的特性。

High Efficiency Nano-Silver-Doped Holographic Polymer Dispersed Liquid Crystal Grating

The preparation and characteristics of holographic electrically controlled grating with high diffraction efficiency based on nano-Ag-doped polymer dispersed liquid crystal (PDLC) materials are reported. By adding appropriate amount of nano-Ag material to the original PDLC materials system to make the holographic volume grating, the influences of doping mass ratio of nano-Ag to the diffraction efficiency, driving voltage and response time of holograhic polymor dispersed liquid crystal (H-PDLC) grating are researched. The experimental results indicate that, through doping nano-Ag particles, the separation of polymer and liquid crystal is optimized and the separation between polymer and liquid crystal becomes exhaustive; the primary diffraction efficiency of the H-PDLC grating is obviously improved, and the electro-optical property is ameliorated simultaneously. Preliminary analysis indicates that the improvement of the characteristics is attributed to the surface plasmon effect of nano-Ag and the matching of the refractive index system.