TY - JOUR

T1 - Real-time ultrafast oscilloscope with a relativistic electron bunch train

AU - Baek, In Hyung

AU - Kim, Hyun Woo

AU - Bark, Hyeon Sang

AU - Jang, Kyu Ha

AU - Park, Sunjeong

AU - Shin, Junho

AU - Kim, Young Chan

AU - Kim, Mihye

AU - Oang, Key Young

AU - Lee, Kitae

AU - Rotermund, Fabian

AU - Vinokurov, Nikolay A.

AU - Jeong, Young Uk

N1 - Funding Information: This work was supported by the World Class Institute (WCI) Program of the National Research Foundation of Korea (NRF), funded by the Ministry of Science, ICT and Future Planning (NRF grant no. WCI 2011-001), and an internal R&D programme at KAERI funded by the Ministry of Science and ICT (MSIT) of the Republic of Korea (524450-20), and a National Research Council of Science & Technology (NST) grant by the Korea government (MSIT) (no. CAP-18-05-KAERI). Publisher Copyright: © 2021, The Author(s).

PY - 2021/12

Y1 - 2021/12

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85119855456&partnerID=8YFLogxK

U2 - 10.1038/s41467-021-27256-x

DO - 10.1038/s41467-021-27256-x

M3 - Article

C2 - 34824264

AN - SCOPUS:85119855456

VL - 12

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

IS - 1

M1 - 6851

ER -