Generation of isolated attosecond pulses by spatial shaping of a femtosecond laser beam

Details Generation of isolated attosecond pulses by spatial shaping of a femtosecond laser beam Generation of isolated attosecond pulses by spatial shaping of a femtosecond laser beam

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008njph...10h3040s&link_type=abstract

New Journal of Physics, Volume 10, Issue 8, pp. 083040 (2008).

Physics

12

Scientific paper

We present a new method for generating isolated attosecond pulses via high-order harmonic generation in gases. It relies on using collective effects to achieve transient phase-matching which provides both a high efficiency and a strong temporal confinement under specific conditions. By controlling the spatial shape of the fundamental beam and the geometry of the laser gas interaction, this transient phase matching leads to the generation of isolated broadband attosecond pulses with long driving pulses (10 20 fs) even without controlling their carrier envelope phase. Such laser pulses are becoming available at high energy levels and our approach offers a route to increase the energy of isolated attosecond pulses by orders of magnitude as compared to existing sources.

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