Real-time ultrafast oscilloscope with a relativistic electron bunch train

In Hyung Baek, Hyun Woo Kim, Hyeon Sang Bark, Kyu Ha Jang, Sunjeong Park, Junho Shin, Young Chan Kim, Mihye Kim, Key Young Oang, Kitae Lee, Fabian Rotermund, Nikolay A. Vinokurov, Young Uk Jeong

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование


The deflection of charged particles is an intuitive way to visualize an electromagnetic oscillation of coherent light. Here, we present a real-time ultrafast oscilloscope for time-frozen visualization of a terahertz (THz) optical wave by probing light-driven motion of relativistic electrons. We found the unique condition of subwavelength metal slit waveguide for preserving the distortion-free optical waveform during its propagation. Momentary stamping of the wave, transversely travelling inside a metal slit, on an ultrashort wide electron bunch enables the single-shot recording of an ultrafast optical waveform. As a proof-of-concept experiment, we successfully demonstrated to capture the entire field oscillation of a THz pulse with a sampling rate of 75.7 TS/s. Owing to the use of transversely-wide and longitudinally-short electron bunch and transversely travelling wave, the proposed “single-shot oscilloscope” will open up new avenue for developing the real-time petahertz (PHz) metrology.

Язык оригиналаанглийский
Номер статьи6851
ЖурналNature Communications
Номер выпуска1
СостояниеОпубликовано - дек. 2021

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