Non-destructive testing of materials by time-domain terahertz (THz) imaging

通过时域太赫兹 (THz) 成像对材料进行无损检测

• 批准号: RGPIN-2016-05020
• 负责人: Blanchard, François
• 金额: $ 2.26万
• 依托单位: École de technologie supérieure
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=684001
• 关键词: Non; destructive; testing; materials; time

Terahertz (THz) waves cover the electromagnetic region from 100 GHz to 15 THz, thus bridging the gap between microwaves and infrared (IR) light. For long time, this frequency range has been unexplored due to a lack of THz source, the so-called `THz frequency gap'. Today's brightness of THz light opens up the door for novel applications ranging from spectroscopic imaging to ultra-high speed short-range telecommunication devices. To directly impact the industry, however, simple generation and detection schemes are still awaiting to be discovering that will enable turnkey applications (e.g. for efficient, non-destructive evaluations at THz frequency). The anticipate approach is to combine different technologies, such as electronics and plasmonics, for realizing novel THz systems that offer orders of magnitude improvements in performance at lower cost than actual systems. This will enable THz radiation to be used to obtain important physical data that are not accessible using X-ray or infrared radiation.****The proposed research is to investigate time-resolved imaging techniques for probing the ultrafast interactions of light-matter using electromagnetic waves of THz frequency. To accomplish this task, we will develop new imaging tools to manipulate THz waves using fiber-laser technologies, precise synchronization systems and up-conversion detection methods. The main objective of the project described here is to build non-destructive techniques using THz waves in order to characterize the composition and the structure of various materials in order to control (in time) their fabrication process and quality. Among other things, these THz pulses will be used to probe novel materials such as the AC conductivity of printable electronics (PE) devices for quality control toward a benchmarking process for industrial THz applications.****The technology and methodology developed by the PI will be transferable to various fields, such as plastic production manufacturing, biosensing and food industry. These investigations provide a glimpse into the potential of this exciting field, and hold promise for the next generation of engineers who desire to be at the front edge of THz technologies.**

Terahertz（THZ）波从100 GHz到15 THz覆盖电磁区域，从而弥合了微波和红外线（IR）光之间的间隙。长期以来，由于缺乏THZ源，即所谓的“ THZ频率差距”，该频率范围一直未被开发。当今的THZ Light的亮度为从光谱成像到超高速度短距离电信设备的新型应用打开了大门。然而，为了直接影响行业，简单的生成和检测方案仍在等待发现可以实现交钥匙应用程序（例如，在THZ频率下进行有效的，无损的评估）。预期的方法是将不同的技术（例如电子和等离子体制剂）结合起来，以实现新型THZ系统，这些系统可提供比实际系统低的成本提高性能的数量级。这将使THZ辐射能够用于获得使用X射线或红外辐射无法访问的重要物理数据。****建议的研究是研究使用THZ频率电磁波探测轻型物质的超快相互作用的时间分辨成像技术。为了完成这项任务，我们将开发新的成像工具，使用光纤激光技术，精确的同步系统和上转换检测方法来操纵THZ波。此处描述的项目的主要目的是使用THZ波构建非破坏性技术，以表征各种材料的组成和结构，以控制其制造过程和质量。除其他外，这些THZ脉冲将用于探测新颖的材料，例如可打印电子设备（PE）设备的交流电导率，用于质量控制工业THZ应用的基准测试过程。这些调查可以瞥见这个令人兴奋的领域的潜力，并为希望成为THZ技术前边缘的下一代工程师持希望。**