论文部分内容阅读
采用一次性曝光光路制备了基于全息聚合物分散液晶的亚微米周期染料掺杂二维光子晶体,晶格常数为582nm.选取4-(二氰亚甲基)-2-甲基-6-(4-二甲氨基苯乙烯基)-4H-吡喃作为激光染料,利用输出波长为532nm的Nd:YAG倍频脉冲激光器作为抽运光源对染料掺杂二维光子晶体进行抽运,得到了中心波长为627.4nm的窄线宽、低阈值的输出激光,激光线宽为0.4nm,阈值能量约为22.7μJ.与目前国外的报道相比,激光线宽和阈值能量都有了很大幅度的降低.将其与基于一维光栅的分布反馈式激光器相比,线宽从1.4nm减小到0.4nm.这一实验结果为可调谐光子晶体激光器的研制提供了一种非常有意义的思路.
A one-time exposing optical path was used to fabricate a two-dimensional photonic crystal doped with submicron periodic dye based on holographic polymer dispersed liquid crystal with a lattice constant of 582 nm. The 4- (dicyanomethylene) -2-methyl-6- 4-dimethylaminostyryl) -4H-pyran as a laser dye, the dye-doped two-dimensional photonic crystal was pumped by using a Nd: YAG frequency multiplication pulse laser with an output wavelength of 532 nm as a pumping light source to obtain a center The wavelength of 627.4nm narrow linewidth, low threshold output laser, the laser linewidth is 0.4nm, the threshold energy is about 22.7μJ. Compared with the current foreign reports, the laser linewidth and threshold energy have a very large Compared with the distributed feedback laser based on one-dimensional grating, the linewidth is reduced from 1.4nm to 0.4nm.The experimental results provide a very interesting idea for the development of tunable photonic crystal lasers.