多孔硅复合非线性光学材料性质的研究

项目名称： 多孔硅复合非线性光学材料性质的研究

项目编号： No.11204264

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学I

项目作者： 向梅

作者单位： 新疆师范大学

项目金额： 25万元

中文摘要： 本项目针对多孔硅自身的特点，提出在多孔硅孔隙中嵌入具有较强非线性光学性质的有机物和纳米金属颗粒，或者在多孔硅中注入离子，形成多孔硅复合体系增强其非线性光学效应；研究不同剂量和不同组分的嵌入材料对多孔硅微观形貌和非线性光学性质的影响；采用反射单光束扫描法测量研究多孔硅及复合物的非线性光学参数，这方法无需将多孔硅从衬底上剥离，不会损坏样品，并且测量结果的重复性较好；研究具有高的三阶非线性光学效应和快速响应的多孔硅基复合体系，用于制备硅基全光开关器件。本项目是一项创新性的课题，研究内容全部为非线性光学领域的新内容，这一研究将对开发快速响应、低成本的复合非线性光学材料有着重要学术意义和社会效益。

中文关键词： 多层多孔硅；复合材料；二阶非线性光学；三阶非线性光学；离子注入

英文摘要： We have studied the photodynamical process and Raman spectra of PS. It was found that S-band luminescence comes from highly confined regions with a distribution of size. Quantum confinement increases the emission energy and the oscillator strength of the radiative transition, decreasing the radiative lifetime. Therefore, the most accepted luminescence mechanism at this time is associated with quantum confinement in the nc-Si formed in the PS by the anodization process. The presence of 3 nm size nanocrystallites is the size required by the confinement mechanisms to enlarge the band gap. On the other hand, in nonlinear optical experiments a key parameter to be measured is the nonlinear refractive index which is related to a variety of other NLO effects through the formalism of NLO susceptibilities. To study ultrafast nonlinear optical response on the picosecond time scale plays an important role for practical NLO applications such as switching and modulation. In order to enhance nonlinear properties of PS even more, pores can be filled up with other more nonlinear materials.

英文关键词： multilayer porous silicon；composite material；third order nonlinear optical；second order nonlinear optical；ion implantation