Gariepy Genevieve, Krstajić Nikola, Henderson Robert, Li Chunyong, Thomson Robert R, Buller Gerald S, Heshmat Barmak, Raskar Ramesh, Leach Jonathan, Faccio Daniele
Institute of Photonics and Quantum Sciences, Heriot-Watt University, David Brewster Building, Edinburgh EH14 4AS, UK.
1] Institute for Micro and Nano Systems, University of Edinburgh, Alexander Crum Brown Road, Edinburgh EH9 3FF, UK [2] Queen's Medical Research Institute, University of Edinburgh, 47 Little France Crescent, Edinburgh EH16 4TJ, UK.
Nat Commun. 2015 Jan 27;6:6021. doi: 10.1038/ncomms7021.
The ability to record images with extreme temporal resolution enables a diverse range of applications, such as fluorescence lifetime imaging, time-of-flight depth imaging and characterization of ultrafast processes. Recently, ultrafast imaging schemes have emerged, which require either long acquisition times or raster scanning and have a requirement for sufficient signal that can only be achieved when light is reflected off an object or diffused by a strongly scattering medium. Here we present a demonstration of the potential of single-photon detector arrays for visualization and rapid characterization of events evolving on picosecond time scales. The single-photon sensitivity, temporal resolution and full-field imaging capability enables the observation of light-in-flight in air, as well as the measurement of laser-induced plasma formation and dynamics in its natural environment. The extreme sensitivity and short acquisition times pave the way for real-time imaging of ultrafast processes or visualization and tracking of objects hidden from view.
以极高的时间分辨率记录图像的能力使得一系列不同的应用成为可能，如荧光寿命成像、飞行时间深度成像以及超快过程的表征。最近，超快成像方案已经出现，这些方案要么需要很长的采集时间，要么需要光栅扫描，并且需要足够的信号，而只有当光从物体反射或被强散射介质散射时才能实现这一要求。在这里，我们展示了单光子探测器阵列在可视化和快速表征皮秒时间尺度上演变的事件方面的潜力。单光子灵敏度、时间分辨率和全场成像能力使得能够观察空气中传播的光，以及测量自然环境中激光诱导的等离子体形成和动力学。极高的灵敏度和短采集时间为超快过程的实时成像或隐藏物体的可视化和跟踪铺平了道路。
