介电电泳控制的光流控体系中有机随机激光发射研究

项目名称： 介电电泳控制的光流控体系中有机随机激光发射研究

项目编号： No.61307035

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 张丁可

作者单位： 重庆师范大学

项目金额： 28万元

中文摘要： 随机激光发射是激光发射原理中一个全新的概念，以其独特的发光原理和广阔的应用前景受到了众多国内外学者的关注。然而，目前随机激光无论是在理论研究还是实验上都缺乏对随机性的定量描述，输出模式的不可控性和相对较高的激光阈值，仍是随机激光发展亟待解决的问题。本项目针对目前随机激光研究中输出模式不可控的难点，提出了一种全新的随机激光体系- - 介电电泳控制的光流控体系。在该体系中，采用非均匀电场极化分散在光流控体系中的散射粒子，同时通过调控外加电压、频率、流速等外在参数对散射粒子进行分散、富集和定位，从而达到对随机激光光谱输出模式的调节。同时，通过优化散射粒子表面环境，获得低阈值的随机激光发射。确定随机激光输出模式与散射体间的相互作用，实现随机激光模式的最有效控制，成功制备出新型、灵活、可控的微随机激光器。此项研究的开展将为开发输出模式可控的有机随机激光器提供新的思路，为我国自主研发有机随机激光器奠定基础

中文关键词： 随机激光；散射介质；阈值；增益介质；光流体系

英文摘要： Random lasing is a relatively new discovery in the lasing emission theory. It has attracted much attention due to its unique properties and wide applications. However, a random medium would result in unpredictable and uncontrolled lasing properties. Until now, in whether theoretical or experimental study, there is seldom report for a keen understanding of what factors impact the various properties of random lasing emission. This project will propose an exciting new random lasing system- - Dielectrophoretically controlled optofluidic platforms, which will create a dynamically reconfigurable and actively controlled random lasing mode. By changing the applied voltage and frequency, particles can be focused to, or repelled from pre-determined locations within a microfluidic channel, and concequently, the random lasing mode will be controlled. With fluid suspended scattering particles and dielectrophoretic control of inter-particle spacing, distribution and cavity topology, the random lasing emission characteristics will be studied in detail. We also investigate the dependence of random lasing emission on dielectrophoretically controlled particle-shape, dielectric constant, surface chemistry and scatterer density, finally explore the utility of this new, flexibly reconfigurable microlaser platform. Success in this p

英文关键词： random laser；scattering media；threshold；gain media；optofluidic