High-harmonic generation from a flat liquid-sheet plasma mirror

Yang Hwan Kim, Hyeon Kim, Seong Cheol Park, Yongjin Kwon, Kyunghoon Yeom, Wosik Cho, Taeyong Kwon, Hyeok Yun, Jae Hee Sung, Seong Ku Lee, Tran Trung Luu, Chang Hee Nam and Kyung Taec Kim ()
Additional contact information
Yang Hwan Kim: Institute for Basic Science
Hyeon Kim: Institute for Basic Science
Seong Cheol Park: Institute for Basic Science
Yongjin Kwon: Institute for Basic Science
Kyunghoon Yeom: Institute for Basic Science
Wosik Cho: Institute for Basic Science
Taeyong Kwon: Institute for Basic Science
Hyeok Yun: Gwangju Institute of Science and Technology
Jae Hee Sung: Institute for Basic Science
Seong Ku Lee: Institute for Basic Science
Tran Trung Luu: The University of Hong Kong
Chang Hee Nam: Institute for Basic Science
Kyung Taec Kim: Institute for Basic Science

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract High-harmonic radiation can be generated when an ultra-intense laser beam is reflected from an over-dense plasma, known as a plasma mirror. It is considered a promising technique for generating intense attosecond pulses in the extreme ultraviolet and X-ray wavelength ranges. However, a solid target used for the formation of the over-dense plasma is completely damaged by the interaction. Thus, it is challenging to use a solid target for applications such as time-resolved studies and attosecond streaking experiments that require a large amount of data. Here we demonstrate that high-harmonic radiation can be continuously generated from a liquid plasma mirror in both the coherent wake emission and relativistic oscillating mirror regimes. These results will pave the way for the development of bright, stable, and high-repetition-rate attosecond light sources, which can greatly benefit the study of ultrafast laser-matter interactions.

Date: 2023
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DOI: 10.1038/s41467-023-38087-3

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