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Updated: Jul 30, 2025

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
Published on: February 4, 2017
Frequency conversion, "superluminal" propagation, and compression of a powerful microwave pulse in propagating
Y Cao1, Y P Bliokh1, V Maksimov1
1Physics Department, Technion, Haifa 320000, Israel.
Abstract:
Frequency up-conversion (∼10%) and compression (almost twofold) of a powerful (≤250 MW) microwave pulse in the propagating ionization front produced by the pulse itself in a gas-filled waveguide, is investigated experimentally and analyzed theoretically. Pulse envelope reshaping and group velocity increase manifest themselves in a propagation of the pulse faster than in the empty waveguide. A simple one-dimensional mathematical model allows the adequate interpretation of the experimental results.
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