Double pulse quasi-collinear high harmonic generation scheme as a tool for X-ray laser plasma gain probing |
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| Authors: | Sameh Daboussi Sophie Kazamias Kevin Cassou Olivier Guilbaud Moana Pittman Olivier Delmas Olivier Neveu Brigitte Cros Gilles Maynard David Ros |
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| Institution: | 1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, 980-8577, Japan
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| Abstract: | We calculate the field distribution based on the vector diffraction theory for a superposition of spirally phase shifted radially polarized beams. Twisted longitudinally polarized field is found in the focal region. The total intensity as well as the polarization components rotates around the beam axis near the focus. Calculation of the Poynting vector at the focal plane shows that the electromagnetic energy is redistributed between different polarization components. Nonzero value of transverse components of the Poynting vector implies the transverse flow of the energy in the focal region. |
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