Submicrometer focusing of isolated attosecond XUV pulses approaching 10${}^{16}$ W/cm${}^2$

Kotaro Imasaka, Dianhong Dong, Natsuki Kanda +6

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…