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arXiv · 2106.11259

Temporal characterization of long quantum-path high harmonics

A. Carpeggiani·B. Bodi·E. S. Skantzakis·J. W. G. Tisch·J. P. Marangos·D. Charalambidis·P. Tzallas·A. Zair
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Abstract

We measure for the first time the duration of long-quantum path EUV high harmonics produced in xenon gas. The long-quantum path contribution to the high-harmonic signal was carefully controlled by employing a two-colour driving laser field and a high-harmonic spatial selection in the far field, over a range of $18-25\,eV$ in photon energy. To characterise the temporal profile of long quantum path high harmonics, we performed a second order volume autocorrelation ($2-IVAC$) via two EUV photon double ionization in argon. Our results show the production and characterisation of a train of EUV pulses from the long-path with pulse duration as short as $1.4\,fs$. This measurement demonstrates that the long-quantum path emission can have enough flux for performing non-linear EUV experiments, and that the long trajectories enable a pulse duration short enough to support measurements with a temporal resolution below $2\,fs$.

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A. Carpeggiani, B. Bodi, E. S. Skantzakis, J. W. G. Tisch, J. P. Marangos, D. Charalambidis, P. Tzallas, A. Zair. 2021-06-21. Temporal characterization of long quantum-path high harmonics. https://arxiv.org/abs/2106.11259

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