Temporal model for quasi-phase matching in high-order harmonic generation

Temporal model for quasi-phase matching in high-order harmonic generation

We present a model for quasi-phase matching (QPM) in high-order harmonic generation (HHG). Using a one-dimensional description, we analyze the time-dependent, ultrafast wave-vector balance to calculate the on-axis harmonic output versus time, from which we obtain the output pulse energy. Considering...

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Veröffentlicht in:Optics express 2017-02, Vol.25 (4), p.3621-3638
Hauptverfasser: Tao, Y, Goh, S J, Bastiaens, H M J, van der Slot, P J M, Biedron, S G, Milton, S V, Boller, K-J
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container_end_page 3638
container_issue 4
container_start_page 3621
container_title Optics express
container_volume 25
creator Tao, Y
Goh, S J
Bastiaens, H M J
van der Slot, P J M
Biedron, S G
Milton, S V
Boller, K-J
description We present a model for quasi-phase matching (QPM) in high-order harmonic generation (HHG). Using a one-dimensional description, we analyze the time-dependent, ultrafast wave-vector balance to calculate the on-axis harmonic output versus time, from which we obtain the output pulse energy. Considering, as an example, periodically patterned argon gas, as may be provided with a grid in a cluster jet, we calculate the harmonic output during different time intervals within the drive laser pulse duration. We find that identifying a suitable single spatial period is not straightforward due to the complex and ultrafast plasma dynamics that underlies HHG at increased intensities. The maximum on-axis harmonic pulse energy is obtained when choosing the QPM period to phase match HHG at the leading edge of the drive laser pulse.
doi_str_mv 10.1364/OE.25.003621
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title Temporal model for quasi-phase matching in high-order harmonic generation
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