The frontier of ultrafast science pushes the development of stable generation of isolated attosecond pulses. Here, the authors demonstrate a filamentation-assisted transient phase-matching mechanism, driven by post-compressed Yb-based few-cycle lasers. They produce stable, high-contrast, isolated attosecond pulses as short as 200, 69 and 65 as in argon, neon and helium.
- Yu-En Chien
- Marina Fernández-Galán
- Ming-Chang Chen