论文部分内容阅读
通过向SiO2Opal模板中填充钛酸乙酯制备TiO2光子晶体,观测到光子晶体带隙位置的移动达62nm,并发现光子晶体的有序度随填充率的升高而下降.向聚苯乙烯Opal模板中填充钛酸乙酯,制备成当时填充率最高、带隙最短的紫外波段TiO2反Opal光子晶体(中心波长~380nm),并根据测量的其透射谱估算出其填充率约为12%,即Opal模板孔隙的50%被填充.本文还对二维PPLN光子晶体进行了研究.建立了一套高压极化装置和电压数据采集装置,通过外加电场极化法成功制备出了具有正方形和矩形两种晶格形状二维PPLN光子晶体.利用二维PPLN的二阶准相位匹配,测量了其对1.064μm激光的二次谐波转换效率,并研究了晶体的温度、激光的入射角度及占空比对二次谐波转换效率的影响.利用矩形晶格实现了多方向、多波长倍频高效输出.
The TiO2 photonic crystals were prepared by filling SiO 2 template with ethyl titanate and the photonic bandgap was observed to move up to 62 nm. It was found that the order of the photonic crystals decreased with the increase of the filling rate. To the polystyrene Opal template Was filled with ethyl titanate to prepare a TiO2 anti-Opal photonic crystal (center wavelength ~ 380 nm) with the highest filling rate and the shortest band gap at the time, and the filling rate was estimated to be about 12% according to the measured transmission spectrum 50% of the aperture of the Opal template is filled in. The two-dimensional PPLN photonic crystal is also studied in this paper.A set of high-voltage polarization device and voltage data acquisition device are set up and a square- The two-dimensional PPLN photonic crystals with two-dimensional PPLNs were measured by the second-order quasi-phase matching of two-dimensional PPLNs. The second harmonic conversion efficiency of the 1.064μm laser was measured. The crystal temperature, Compared with the second harmonic conversion efficiency, rectangular multi-directional multi-wavelength multi-wavelength high efficiency output is realized.