飞秒矢量光束与物质相互作用的超快过程研究

项目名称： 飞秒矢量光束与物质相互作用的超快过程研究

项目编号： No.61275133

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 王晓雷

作者单位： 南开大学

项目金额： 74万元

中文摘要： 任意偏振分布的矢量光束具有独特的焦场特性，在微粒操控、激发表面等离子体和超分辨率成像等领域显示出了广泛的应用前景。飞秒激光与物质相互作用的过程除了与激光脉冲强度有关还依赖于激光脉冲的偏振特性。本项目基于超快时间分辨的泵浦探测技术，综合运用阴影成像、数字全息术、光谱分辨探测、光散射测量等实验手段，对飞秒矢量光束与物质相互作用的超快动力学过程进行具有高时间、空间分辨的实验研究，获得飞秒矢量光束与材料相互作用过程中的有关物质喷射特性、物质转化、热区域转移、微结构形貌时空演化、冲击波特性等不同研究对象所包括的强度、位相、光谱、散射等超快特征参量在内的实验数据；研究飞秒矢量光束的不同偏振特性对于超快过程的不同影响。并在实验研究的基础上，结合分子动力学和全矢量麦克斯韦方程建立飞秒矢量光束与物质相互作用的物理模型，揭示矢量光束与物质相互作用的物理实质。

中文关键词： 矢量光束；光场多维调控；飞秒激光；激光与材料相互作用；

英文摘要： Vector beams with inhomogeneous polarization distributions have unique focusing properties，which has potential applications in many areas such as particle manipulation, surface Plasmon excitation, and superresolution imaging. The ultrafast process of femtosecond laser pulse interaction with matter not only relates to the intensity of the laser but also the polarization properties. Based on pump-probe technique with ultrafast time resolution, this project comprehensively utilizes time-resolved shadowgraphy, digital holography, ultrafast time resolved spectroscopy, and light scattering technique to detect the dynamic process of femtosecond laser interaction with matter with high time and spatial resolution. Experiment data should contain ultrafast characteristic parameters such as intensity, phase, spectrum and scattering, which can characterize ejection of material, material transition, transfer of heat region, time-space evolution progress of the microstructure and shock wave. How the different polarizations affect the ultrafast process is also studied in this project. The physical model which combines the molecular dynamics with full vector Maxwell's equations will be established based on the experiments to reveal the essence of vector beam interaction with matters.

英文关键词： vector beam；multiple modulation of optical field；femtosecond pulse laser；interaction of laser with material；