Center for Relativistic Laser Science

2019 IBS AOI Conference

Femtoseconds-scale ultrafast imaging has served as an essential tool to directly visualize fast dynamics in a wide variety of applications in molecular biology, physical chemistry, atomic physics, and fluid dynamics. The conventional techniques providing a frame rate up to trillion frames per seconds include a streak camera, pump-probe imaging and time of flight system. However, the existing methods are either sacrificing the number of imaging dimension or demanding many repetitions of the same scene. Recently many interesting single-shot 2D ultrafast imaging techniques was developed for recording non-repetitive dynamic scenes^1,2,3. Nevertheless, there are still weakness in the number of frames, the number of image pixels, spatial and temporal resolution. Here, we present a microscopic femtosecond imaging technique that can capture non-repetitive dynamic scenes at 200 fs frame interval, 4 mm spatial resolution and a dozen frames. We used an interferometric imaging setup that gives different time delay to multi reference pulses with spatial frequency division. Our new ultrafast camera scheme, with a potential to achieve a trillions-frame-rate microscopy will have profound impacts in ultrafast imaging area.

References

[1] K. Nakagawa, A. Iwasaki, Y. Oishi, R. Horisaki, A. Tsukamoto, A. Nakamura, K. Hirosawa, H. Liao, T. Ushida, K. Goda, F. Kannari & I. Sakuma, “Sequentially timed all-optical mapping photography (STAMP)”, Nature Photonics 2014, 8, 695–700.

[2]Andreas Ehn, Joakim Bood, Zheming Li, Edouard Berrocal, Marcus Aldén and Elias Kristensson, “Single-shot compressed ultrafast photography at one hundred billion frames per second”, Nature,516,74-77.

[3]Andreas Ehn, Joakim Bood, Zheming Li, Edouard Berrocal, Marcus Aldén and Elias Kristensson, “FRAME: femtosecond videography for atomic and molecular dynamics”, Light: Science & Applications 2017,6,e17045.