本論文主要可以分為準相位匹配原理的介紹、二維週期性極化反轉非線性光子晶體的製作以及鉭酸鋰的高溫製程等三大部分。 首先,在原理部分,吾人簡略的介紹了非線性頻率轉換,與準相位匹配的原理。 接著,在製程部分,吾人介紹了幾種週期性結構的製作方式,包含利用高介電係數材料作為絕緣層製作週期性結構,與利用表面淺層反轉製作週期性結構,並比較其優缺點。目前,已經成功在厚度500um的鈮酸鋰中製作出週期29.5um二維週期性結構,且有效長度可以達到12mm左右。 最後,在高溫製程部分,吾人在高溫下對鉭酸鋰晶體作高電壓極化反轉,觀察到其矯頑電場隨溫度上升而下降的情況,證實了高溫製程的優點與可行性
This dissertation is organized into three parts: (i)an introduction to the theory of quasi-phase matching,(ii)the fabrication of two-dimensional periodically poled nonlinear crystal(2D NPC) ,and (iii) the high temperature process of lithium tantalate. At first, the theory of nonlinear frequency conversion and quasi-phase matching is briefly introduced. And then, several fabrication processes are introduced, including using the high permittivity material as insulator to make periodically poled structure, and using the surface domain inversion to make periodically poled structure. By doing so, a 500um thickness two dimensional periodically poled lithium niobate with 29.5um period and 12mm effective length is made. Finally, the coercive field of lithium tantalite is observed dramatic decrease in the high temperature fabrication process. It provides the possibility to fabricate thicker 2D NPC at an elevated temperature.