Control of Electrons Correlated Longitudinal Momentum Spectra by Chirp Laser Pulses

Electrons correlated longitudinal momentum spectra of nonsequential double ionization of He atom in few-cycle chirp laser pulses are investigated by a 3D semi-classical re-scattering model. Asymmetry distributions between the first and the third quadrants in the spectra are sensitive to chirp parameter. The longitudinal momentum spectra can be controlled by chirp parameter in few-cycle chirp pulses more sensitively than by CEP in ordinary few-cycle pulses.