Fig. 3
From: Vectorizing the spatial structure of high-harmonic radiation from gas
Reconstructed two-dimensional beam intensity profiles of the 25th harmonic beam. The spectrally resolved 2D profile of generated XUV beams can be reconstructed by translating the spectrometer while recording the spectrogram. a Measured beam profile without going through the XUV polarizer. b–d Projected intensity profiles for different linear bases. By changing the relative angle b 0°, c 45°, d 90° between the vector beam generator and the XUV polarizer, we measure the intensity distribution of 25th harmonic beam after going through the XUV polarizer. Driven by the designed vector fundamental beam, the generated XUV radiation consists of both s-polarized and p-polarized components shown in b, d. The intensity does not vanish at bright spots, while changing the relative angle between the polarizer and polarization of the beam. c When the relative angle is set to 45°, modulation appears in both vertical and horizontal directions
