Sub-cycle waveform synthesis for effective control of electron localization

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We have proposed and demonstrated an effective scheme to steer both the electronic and molecular motions of hydrogen molecule and its isotopes. Our scheme lies in the idea of sub-cycle waveform shaping (SWS) with synthesizing coherent IR pulses of different wavelengths. The quantum model simulation indicates a remarkable enhancement of the electron localization asymmetry compared with the few-cycle pulse. 68% and 89% electrons of the dissociating fragmentation can be localized to one nucleus for H₂+ and H₂, respectively.