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arXiv · 2604.20084

9.8-GW tabletop attosecond light source

Lihui Meng·Lu Xu·Xusheng Zhu·Lixin He·Zan Nie·Pengfei Lan·Peixiang Lu
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Abstract

The generation of attosecond pulses has enabled real-time observation and manipulation of coherent electron dynamics, yet their low peak power has hindered the development of advanced attosecond pump-probe spectroscopy and attosecond nonlinear metrology. Here we overcome this limitation by generating a 2.8 uJ, 292 as isolated attosecond pulses with a peak power of 9.8GW,the highest pulse energy and peak power reported for a tabletop isolated attosecond source.This is achieved by combining a 2.4TW, few-cycle(8.3 fs) two-color synthesizer with a loose focusing geometry that enables macroscopic phase-matching. The synthesizer features a stabilized carrier-envelope phase and an actively synchronized relative time delay between the two-color channels, ensuring high stability and reproducibility. This high-power tabletop attosecond source will open up nonlinear effect experiments that were previously inaccessible with lower-power IAPs, establishing a foundation for advanced attosecond spectroscopy and nonlinear metrology.

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Lihui Meng, Lu Xu, Xusheng Zhu, Lixin He, Zan Nie, Pengfei Lan, Peixiang Lu. 2026-09-21. 9.8-GW tabletop attosecond light source. https://arxiv.org/abs/2604.20084

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