CAREER: A Single Shot Camera Capturing Ultrafast Dynamic Phenomena

事业：捕捉超快动态现象的单镜头相机

• 批准号: 1351455
• 负责人: Ki-Yong Kim
• 金额: $ 40万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-07-15 至 2019-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1351455&HistoricalAwards=false
• 关键词: CAREER; Single; Shot; Camera; Capturing

This research is focused on developing new methodologies for ultrafast imaging. In particular, it will contribute to a new development of ultrafast optical and X-ray cameras capable of providing molecular movies with unprecedented spatial and temporal resolution. This will greatly advance ultrafast optical science in single-molecule imaging, light-matter interaction, and inertial confinement fusion. The project also includes educational activities such as developing a summer/winter short course in optical science for undergraduate and graduate students, as well as training one graduate and two undergraduate and/or local high school students per year in the PI's laboratory. The research also includes extensive educational activities for students in individual and collaborative research settings.Conventional pump-probe methods can routinely provide ultrafast time-resolved imaging, but they mostly work for highly repeatable events. However, if event-to-event reproducibility is irregular or involves material damage, irreversible chemical reactions, and/or structural phase transition, single-shot detection is a necessity. The project here is to develop a single-shot camera capable of capturing ultrafast dynamic images, simultaneously recording spatial (2-dimensional) and temporal evolutions in a single-shot. Such a camera can capture images at a frame rate of ~50 trillion frames per second, recording 3 ~ 60 frames in a single-shot. Here, the enabling technologies include ultra-broadband spectrum generation, ultrafast optical pulse shaping, and single-shot hyperspectral imaging. This kind of camera can be potentially used in material characterization, biomedical imaging, bio-sensors, and optical and plasma diagnostics. In particular, its application in X-ray free electron lasers will lead to ultrashort electron beam imaging and characterization.

这项研究的重点是开发超快成像的新方法。特别是，它将有助于超快光学和 X 射线相机的新发展，能够提供具有前所未有的空间和时间分辨率的分子电影。这将极大地推进单分子成像、光与物质相互作用和惯性约束聚变方面的超快光学科学。该项目还包括教育活动，例如为本科生和研究生开发光学科学夏季/冬季短期课程，以及每年在 PI 实验室培训一名研究生和两名本科生和/或当地高中生。该研究还包括在个人和协作研究环境中为学生提供广泛的教育活动。传统的泵浦探测方法通常可以提供超快时间分辨成像，但它们主要适用于高度可重复的事件。然而，如果事件之间的再现性不规则或涉及材料损坏、不可逆化学反应和/或结构相变，则有必要进行单次检测。这里的项目是开发一种单镜头相机，能够捕捉超快动态图像，同时在单镜头中记录空间（二维）和时间演变。这种相机可以以每秒~50万亿帧的帧速率捕获图像，单次拍摄3~60帧。这里的支持技术包括超宽带光谱生成、超快光脉冲整形和单次高光谱成像。这种相机可潜在用于材料表征、生物医学成像、生物传感器以及光学和等离子体诊断。特别是，它在 X 射线自由电子激光器中的应用将导致超短电子束成像和表征。