Yasuo Nabekawa

Submicrometer focusing of isolated attosecond XUV pulses approaching 1016 W/cm2

We demonstrate submicrometer focusing of isolated attosecond pulses (IAPs) in the extreme ultraviolet (XUV) region using a custom ellipsoidal mirror. The obtained focal spot sizes were verified using knife-edge measurements with a sharp silicon edge, confirming reproducible dimen...