Femtosecond laser-materials interactions and applications to materials modification

飞秒激光-材料相互作用及其在材料改性中的应用

• 批准号: 121539-2011
• 负责人: Haugen, Harold
• 金额: $ 2.7万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=545332
• 关键词: Femtosecond; laser; materials; interactions; applications

Ultrafast lasers producing extremely short light pulses on the femtosecond time frame have opened the door to a wide range of fundamental studies and novel applications. The duration of these light pulses is so short that energy is delivered to a material on a time frame fast compared with the relevant physical processes in the solid. The modification of the material can be achieved on very fine length scales extending to the nanometer regime. Ultrashort light pulses also directly enable the exploration of the extremely fast dynamics of the evolution of the target following ultrafast laser pulse irradiation. This proposal aims to launch a new phase of investigation in femtosecond laser ablation and micromachining which has been established in our group in recent years. Near term projects involve silicon photonics, modification of nano-scale targets including carbon nanotubes, and coherent nano-structuring of solid surfaces. TeraHertz radiation capabilities will be utilized in exploring laser processing dynamics and the final state of the targets. Our vision is to achieve a very high level of control of the light-matter interactions with increasingly predictable outcomes of ultrafast laser processing. Medium term projects will greatly enhance the selectivity in energy delivery to the targets through implementation of novel laser beam properties. At that stage, we plan to extend the work into the mid-infrared via facilities of the Advanced Laser Light Source, thereby exploring qualitatively new interaction regimes between laser radiation and materials. We will also utilize the cutting-edge capabilities of the Canadian Centre for Electron Microscopy to conduct fundamental in-situ experiments in a high-resolution transmission electron microscope. With progress in laser and optical technologies, and key extensions into ultrafast mid-infrared, in the longer term we envision our research program taking us into the domain of biophysics. Our work through the period of the Discovery grant will lead to a much enhanced capability in laser-based materials modification, with benefits to Canada in terms of new materials for photonics and electronic applications, new laser and optoelectronic technologies, as well as advances in fundamental materials science.

超快激光器在飞秒时间范围内产生极短的光脉冲，为广泛的基础研究和新颖应用打开了大门。这些光脉冲的持续时间非常短，与固体中的相关物理过程相比，能量在时间范围内快速传递到材料。材料的改性可以在延伸至纳米范围的非常精细的长度尺度上实现。超短光脉冲还可以直接探索超快激光脉冲照射后目标的极快演化动力学。该提案旨在启动我们小组近年来建立的飞秒激光烧蚀和微加工研究的新阶段。近期项目涉及硅光子学、纳米级目标（包括碳纳米管）的改性以及固体表面的相干纳米结构。太赫兹辐射能力将用于探索激光加工动力学和目标的最终状态。我们的愿景是实现对光与物质相互作用的高度控制，并获得越来越可预测的超快激光加工结果。中期项目将通过采用新颖的激光束特性，大大提高向目标输送能量的选择性。在此阶段，我们计划通过先进激光光源的设施将工作扩展到中红外，从而探索激光辐射与材料之间新的相互作用机制。我们还将利用加拿大电子显微镜中心的尖端能力，在高分辨率透射电子显微镜中进行基本的原位实验。随着激光和光学技术的进步，以及超快中红外的关键扩展，从长远来看，我们设想我们的研究计划将我们带入生物物理学领域。我们在发现补助金期间的工作将大大增强基于激光的材料改性的能力，使加拿大在光子和电子应用新材料、新激光和光电技术以及基础材料科学的进步方面受益。