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Updated: Aug 2, 2025

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry

Published on: August 1, 2017

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

Yang Hwan Kim¹, Hyeon Kim^1,2, Seong Cheol Park^1,2

¹Center for Relativistic Laser Science, Institute for Basic Science, Gwangju, 61005, Republic of Korea.

Nature Communications

|April 22, 2023

Summary

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This summary is machine-generated.

Continuous high-harmonic radiation generation is now possible using a liquid plasma mirror, overcoming solid target damage. This breakthrough enables bright, stable, high-repetition-rate attosecond light sources for ultrafast laser-matter interaction studies.

Area of Science:

Laser-plasma interactions
Attosecond science
Extreme ultraviolet and X-ray generation

Background:

High-harmonic radiation (HHR) is generated by reflecting ultra-intense laser beams from over-dense plasmas (plasma mirrors).
This technique is promising for generating intense attosecond pulses in the EUV and X-ray ranges.
Solid targets used for plasma mirrors are damaged, limiting applications requiring extensive data acquisition.

Purpose of the Study:

To demonstrate continuous high-harmonic radiation generation from a liquid plasma mirror.
To overcome the limitations of solid targets in plasma mirror applications.
To enable development of stable, high-repetition-rate attosecond light sources.

Main Methods:

Utilizing a liquid target to form an over-dense plasma mirror.

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Investigating high-harmonic radiation generation in both coherent wake emission and relativistic oscillating mirror regimes.

Characterizing the generated radiation from the liquid plasma mirror.

Main Results:

Continuous generation of high-harmonic radiation was achieved from a liquid plasma mirror.
Both coherent wake emission and relativistic oscillating mirror regimes were observed.
The liquid plasma mirror approach circumvents the target damage issue inherent to solid targets.

Conclusions:

Liquid plasma mirrors offer a viable alternative to solid targets for high-harmonic radiation generation.
This advancement facilitates the creation of bright, stable, high-repetition-rate attosecond light sources.
The findings significantly benefit research in ultrafast laser-matter interactions and related fields.