2026-09-28 理化学研究所
ギガワット級アト秒レーザーのサブミクロン集光イメージ
＜関連情報＞
- https://www.riken.jp/press/2026/20260928_1/index.html
- https://spj.science.org/doi/10.34133/ultrafastscience.0198
10¹⁶ W/cm²に近づく孤立したアト秒 XUV パルスのサブマイクロメートル集束 Submicrometer Focusing of Isolated Attosecond XUV Pulses Approaching 1016 W/cm2
Kotaro Imasaka, Dianhong Dong, Natsuki Kanda, Bing Xue, […] , and Eiji J. Takahashi
Ultrafast Science Published:23 Sep 2026
DOI:https://doi.org/10.34133/ultrafastscience.0198
Abstract
We demonstrate submicrometer focusing of isolated attosecond pulses in the extreme ultraviolet region using a custom ellipsoidal mirror. The obtained focal spot sizes were verified using knife-edge measurements with a sharp silicon edge, confirming reproducible dimensions down to 0.46 μm × 0.36 μm (full width at half maximum), demonstrating near-diffraction-limited focusing performance. Focusing a 1.1-GW tabletop isolated attosecond pulse source yields a peak intensity of 3 × 1015 W/cm2, and a realistic pathway toward 1016 W/cm2 is obtained by optimizing the beamline throughput. These results establish a practical route toward attosecond nonlinear optics in both gas and solid phases, driven by intense extreme ultraviolet fields.
