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Abstract: We report a novel quasi-phase matching technique for high-order harmonicgeneration in low-density gases. Numerical simulations show that in few-opticalcycle pulsed Bessel beams it is possible to control the pulse envelope andphase velocities which in turn allows to control the carrier-envelope phaseduring propagation. The resulting oscillations in the peak intensity allow tophase-match the high-order harmonic generation process with a nearly two decadeenhancement in the XUV power spectrum.



Autor: Daniele Faccio, Carles Serrat, Jose' M. Cela, Albert Farres Paolo Di Trapani, Jens Biegert

Fuente: https://arxiv.org/







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