Spinning linearly polarized harmonic generation via polarization shaping

Here we theoretically demonstrate the generation of spinning linearly polarized harmonics through the combination of polarization shaping with high-order harmonic generation. Specifically, two orthogonally polarized 800-nm femtosecond pulses with precisely controlled relative peak amplitude were combined to obtain a spinning linearly polarized driving field, with which we show a successful chirality transfer from the driving field to the resultant harmonics through its interaction with isotropic Ar atoms. Systematic investigations of the influence from the polarization rotational speed and the peak amplitude of the driving field were conducted, which reveal that the angular frequency and the harmonic order of spinning linearly polarized harmonics can be manipulated independently. The proposed strategy extends the photon energy of the laser fields with twisted polarization into the extreme ultraviolet region, which paves the way for exploring ultrafast dynamics on the attosecond timescale.