基于飞秒光丝的大气污染光谱灵敏检测新方法和新技术

项目名称： 基于飞秒光丝的大气污染光谱灵敏检测新方法和新技术

项目编号： No.61505106

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 袁帅

作者单位： 上海理工大学

项目金额： 20万元

中文摘要： 飞秒激光成丝由于其高能量远距离传输特性，已经越来越多的出现在当今科研工作者的视野中。其应用范围已囊括污染物成份检测，远距离荧光遥感探测，太赫兹产生，分子取向，人工降雨等多个研究领域。本项目拟研究飞秒光丝在大气污染检测方面的新方法和新技术。具体研究内容包括：利用飞秒激光诱导化学反应提升飞秒光丝荧光检测精度；飞秒激光诱导固体小颗粒和气溶胶（雾霾成份）的化学反应研究；通过等离子体光栅提升局域光场强度实现污染物成份的高灵敏检测；利用飞秒光丝远程传播特性实现污染物光谱远程探测等。本项目以实验为主，理论为辅。

中文关键词： 超快光谱学；超快荧光光谱；飞秒激光器；飞秒激光成丝

英文摘要： Recent advances in femtosecond laser technologies have made it possible to develop the applications in spectral technique for identifying molecules with high sensitivity. A high intensity is clamped inside a filament in air. Under this intensity, molecules, apart from being ionized, can be highly excited and dissociated, resulting in “fingerprint” fluorescence of molecular fragments. Filamenation has been widely applied in many fields, such as remote sensing, pollution detection, lightning control, rainmaking, etc. Our project aims at investigating the new problems arising in the laser filamentation-induced atmospheric sensing, as well as their potential applications. The topics include that high sensitivity detection based on chemical reactions induced by laser filamentation; the physical mechanisms underlying the filament-induced dissociation of solid particles and aerosols (smog) in air; the smog ingredients identification through filament-triggered plasma grating; remote sensing of the fluorescence of atmospheric pollutants. Our research mainly relies upon experimental studies and also assistant with theoretical calculations.

英文关键词： ultrafast spectroscopy;femtosecond fluorescence spectrum ;femtosecond laser;filamentation