首页|Generating attosecond pulses with controllable polarization from cyclic H32+ molecules by bichromatic circular fields
Generating attosecond pulses with controllable polarization from cyclic H32+ molecules by bichromatic circular fields
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We investigate the polarization properties of harmonics from the cyclic H32+molecular ions in tailored bichromatic counter-rotating circularly polarized(BCCP)fields by solving the time-dependent Schrödinger equation.The allowed harmonics and their helicities are associated with the symmetry compatibility of the field-target systems,and large intensity difference between adjacent harmonics with opposite helicities appears in a wide spectral range when the BCCP field is at certain rotation angles.We try to explain the intensity difference by using a recombination model based on the quantum-orbit theory and by analyzing the ionization pathways.Moreover,to synthesize attosecond pulse trains with tunable polarization,the intensity difference is manipulated by introducing a seed XUV field,and by changing the relative amplitude ratio as well as the helicity of BCCP fields.
NETL
NSTL
万方数据
