Researchers propose a novel scheme to produce isolated attosecond pulses using relativistic electron mirrors, paving the way for next-generation ultrafast spectroscopy. Capturing nature’s fastest ...

The image captures the generation of attosecond pulses, in which ultrashort (few-cycle) laser pulses interact with a neon gas jet. This interaction initiates high-harmonic generation, yielding the ...

This Collection brings together original research on high harmonic generation, focusing on the underlying physical mechanisms and on the next generation of experimental setups. It also highlights the ...