Abstract

We present a novel source of synchronised attosecond pulses at different photon energies for attosecond pump – attosecond probe experiments [1]. We generate attosecond pulses in the XUV at 90eV photon energy together with a pulse in the VUV at 15 or 20eV photon energy. The availability of two attosecond pulses at distinct photon energies will allow tailoring a pump-probe experiments to the molecules under investigation. For example a VUV pulse would be well suited for the photoionisation step thanks to the high cross section of many molecules in this spectral region [2]. Moreover, compared to a strong NIR field, VUV and XUV pulses do not distort the system under consideration as their intensity is much lower.

© 2015 IEEE