利用双光子聚合技术制备的聚合物型光栅光波导和耦合光栅

自从1970年报道第一个波导光栅之后，人们又很快发现了它在集成光学上的应用潜力．目前，对廉价、可靠和高效的集成光学器件的需求使研究者们开始注意聚合物材料．因此有关各种聚合物型的波导光栅的制备和光学性能的研究备受注意。现在，紫外光漂白、激光切除和光致二色型等一系列方法已经被用于聚合物波导光栅的制备，同时，聚合物波导光栅的光控光开关、光子禁带效应和谐振光栅等各种光学性质也有广泛的研究．迄今，聚合物波导光栅的制备方法基本上属于物理方法，并没有在材料内部引发本质性的化学改变，因此所制备的器件的长期稳定性难以保证．如利用紫外光漂白和光致二色性法制备的波导光栅，前者是靠材料的饱和光吸收引发的折射率变化，后者则是靠聚合物内的染料分子的光致定向作用产生的周期性结构。

Fabrication of Grating Waveguide and Coupling Grating Using Two-photon Initiated Photopolymerization

Two ternary materials systems, which comprise two-photon initiators, oligomer and poly(methyl methacrylate), were prepared. A polymeric waveguide film was manufactured by spinning the materials on ITO, and the two-photon initiated photopolymerization(TPIP) was carried out successfully in the waveguide film. Consequently, an approach using TPIP is demonstrated for fabrication of grating in a thin polymeric film possessing waveguide properties. The results show that the resulted grating can manipulate and couple light.