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: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=753992
• 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.

太赫兹 (THz) 波覆盖 100 GHz 至 15 THz 的电磁区域，从而弥合了微波和红外 (IR) 光之间的差距。长期以来，由于缺乏太赫兹源，这个频率范围一直未被探索，即所谓的“太赫兹频率间隙”。如今太赫兹光的亮度为从光谱成像到超高速短程电信设备等新颖应用打开了大门。然而，为了直接影响该行业，仍然有待发现简单的生成和检测方案，以实现交钥匙应用（例如，在太赫兹频率下进行高效、无损的评估）。预期的方法是结合不同的技术，例如电子学和等离子体技术，以实现新颖的太赫兹系统，该系统以比实际系统更低的成本提供数量级的性能改进。这将使太赫兹辐射能够用于获取使用 X 射线或红外辐射无法获得的重要物理数据。拟议的研究是研究时间分辨成像技术，以利用太赫兹电磁波探测光与物质的超快相互作用频率。为了完成这项任务，我们将开发新的成像工具，利用光纤激光技术、精确同步系统和上转换检测方法来操纵太赫兹波。这里描述的项目的主要目标是使用太赫兹波建立无损技术，以表征各种材料的成分和结构，以便（及时）控制其制造过程和质量。除其他外，这些太赫兹脉冲将用于探测新型材料，例如可印刷电子 (PE) 设备的交流电导率，用于工业太赫兹应用基准流程的质量控制。PI 开发的技术和方法将可转让给塑料生产制造、生物传感和食品工业等各个领域。这些研究让我们得以一睹这个令人兴奋的领域的潜力，并为渴望处于太赫兹技术前沿的下一代工程师带来希望。