Autofocusing Airy Beams for Micrometer Scale Laser Induced Breakdown Spectroscopy

用于微米级激光诱导击穿光谱的自动聚焦艾里光束

• 批准号: 533197-2018
• 负责人: Morandotti, Roberto
• 金额: $ 1.82万
• 依托单位: Institut national de la recherche scientifique
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=660164
• 关键词: Autofocusing; Airy; Beams; Micrometer; Scale

Laser-induced breakdown spectroscopy (LIBS) is a technique used routinely for the analysis of the elemental**composition of materials. LIBS is relatively simple to use and allows for rapid, real-time analysis. A pulsed**laser is focused down to a high intensity spot on the material where it produces a short-lived high temperature**micro-plasma or 'spark' which produces copious amounts of light emission. The atomic line emissions from**such plasmas facilitates the identification of the elements within the material. Reducing the plasma volume**would both increase resolution and power efficiency of these methods, as well as open the door to novel**functionalities. However, depositing energy sufficient to create a plasma within small areas and volumes in**practical devices presents significant technical challenges, as the laser beam needs to be simultaneously**focused into the smallest possible spot and at the largest possible distance from the optical system. The aim of**this Engage project is to address such limitations, in particular by introducing the next generation of laser**systems for micro-chemical characterization and micro-processing, i.e. Autofocusing Airy Beams (AABs).**Such an innovation will allow to replace currently used Gaussian beams combined with bulky lens-based**focusing systems. In contrast, AABs are non-diffracting, follow curved trajectories in space, self-heal beyond**obstacles placed in their path and focus abruptly at a predesigned distance, without the help of lenses or mirror**systems. The use of AABs for micro-LIBS analysis will enable ground-breaking advances in the generation and**control of tightly focused beams, setting the basis for the realization of practical, reliable and affordable new**instruments with enhanced performances.**This six months Engage project will be divided in two main phases related to 1) the engineering of**spatiotemporal AABs to achieve optimal focusing conditions, and 2) the demonstration of micro-LIBS analysis**together with AABs. This project will benefits Gastops with innovative characterization techniques.

激光诱导的分解光谱（LIB）是一种通常用于分析材料组成的技术。 LIB相对易于使用，并允许快速实时分析。脉冲**激光聚焦在材料上的高强度点上，在该材料中产生短寿命的高温**微质量或“火花”，从而产生大量的光发射。 **此类等离子体的原子线排放促进了材料中元素的识别。减少等离子体体积**将提高这些方法的分辨率和功率效率，并为新型**功能打开大门。但是，将足以在小区域内创建血浆的能源和**实际设备中的体积带来了重大的技术挑战，因为需要同时**重点放在最小的位置，并且距光学系统可能最大的距离。 **这个参与项目的目的是解决此类局限性，特别是通过引入下一代的激光**系统用于微化学表征和微处理的系统，即通过自动启动光束（AABS）（AABS）。相比之下，AAB是非分裂的，遵循太空中的弯曲轨迹，超越**障碍物的自我障碍，并在没有镜头或镜像**系统的帮助下突然在预先设计的距离上聚焦。使用AABS进行微LIBS分析将使一代中的突破性进步和**控制紧密集中的光束为实现实现实现，可靠和负担得起的新**工具的基础，并具有增强的性能。 Micro-Libs分析**与AABS一起。该项目将通过创新的特征技术受益。