报告题目

Shaped Femtosecond Pulse Train Micro/Nanofabrication

报 告 人

Professor Lan Jiang,　 Beijing Institute of Technology

报告地点

物理楼中楼212教室

报告时间

2012年9月12日下午3:00-4:30

联 系 人

肖云峰

报告摘要

An attosecond/femtosecond pulse duration is shorter than many physical/chemical characteristic times, such as the electron-photon relaxation time, which makes it possible to control electron dynamics. This study proposes to change electron dynamics (selective excitation/ionization) and electron densities in dielectrics to control the following properties and processes: 1) the transient (femtosecond-to-picosecond time scale), localized (nanometer-to-micrometer length scale) optical and thermal properties, 2) the corresponding photon absorption process, and 3) phase change mechanisms, by manipulating femtosecond pulse-train delay/energy distribution and/or combining with other laser pulses for high-precision, high-efficiency micro/nanoscale manufacturing of dielectrics. Also, a quantum multiscale model is proposed to investigate femtosecond laser material interactions. The proposed method is applied in controlling recast, subwavelength ripples, hole aspect-ratios, and the fabrication of high-sensitivity optical fiber sensors.

姜澜，北京理工大学教授、博导，教育部长江学者特聘教授、科技部国家重点基础研究发展规划（973计划）项目首席科学家、科技部“十二五”国家高技术研究发展（863计划）主题专家、国家杰出青年科学基金获得者、北京市青年五四奖章获得者，北京理工大学机械与运载学部副主任，激光微/纳制造研究所所长。兼任中国自然科学基金机械学科“十二五”规划“高能束与特种能场制造科学”领域负责人；Missouri University of Science and Technology客座教授；University of Nebraska-Lincoln客座教授。主要从事激光微纳制造领域的科研工作。迄今共发表论文129篇，第一作者或学生第一作者而本人为第二作者的文章89篇，其中SCI检索67篇。主流国际大会主题/特邀报告42次。