Abstract

To make a breakthrough for attosecond science, one of the most important issues is the development of high-power isolated attosecond pulses (IAPs) and/or attosecond pulse trains (APTs). At present high-power APTs have been successfully generated thanks to research on harmonic energy scaling using a loosely focusing geometry [1]. Although IAP were already obtained using a state-of-the-art Ti:sapphire laser system, output energy is still not sufficient [2] for inducing nonlinear phenomena. Since a phase-matching technique can’t be utilized due to high ionization rate of target gas, a efficiency is just 10⁻⁵ level [2] even if Xe gas was used.

© 2013 IEEE