Generation of Complex Vector and Vortex Extreme Ultraviolet Beams Using the S-Waveplate and Spiral Phase Plate during High-Order Harmonics Generation in Argon
Victor KärcherDepartment of Physics and Center for Soft Nanoscience (SoN), University of Münster, Münster 48149, GermanyVyacheslav V. KimDepartment of Physics, Faculty of Physics and Chemistry, Chirchik State Pedagogical University, 104 Amir Temur, Chirchik 111700, UzbekistanAndra Naresh Kumar ReddyLaboratory of Nonlinear Optics, University of Latvia, Jelgavas 3, Riga LV-1586, LatviaH. ZachariasDepartment of Physics and Center for Soft Nanoscience (SoN), University of Münster, Münster 48149, GermanyR. A. GaneevDepartment of Physics, Faculty of Physics and Chemistry, Chirchik State Pedagogical University, 104 Amir Temur, Chirchik 111700, Uzbekistan
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We report the generation of vector and vortex high-order harmonic beams in argon using the femtosecond laser pulses propagated through the phase-modifying optical elements (S-waveplate or spiral phase plate). The effect of two-color pump-enhanced harmonics is combined with the polarization-structured vector and vortex beams. The application of a radially polarized vector beam in the orthogonal polarization two-color pump scheme allows for the generation of spatially structured odd- and even-order harmonics with variably polarized components. The intermediate states between radial and azimuthally polarized vector beams allow the generation of harmonics with twisted wavefronts.
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