Photoelectron momentum distributions of hydrogen atoms using parallel two-color chirped laser pulses

Abstract

We investigate the photoelectron momentum distributions (PEMDs) of hydrogen atoms ionized by a parallel two-color chirped laser field, employing the semi-classical two-step model (SCTS). By modulating the chirp parameter and adjusting the ionization time offset on the attosecond timescale, we demonstrate the ability to control electronic interference across different orbitals. We present PEMDs images obtained over a single time window to explore the electron momentum dynamics, and analyze the classical trajectories to uncover the underlying interference mechanisms. Furthermore, we show the significant impact of the carrier-envelope phase (CEP) on the PEMDs. Offering a novel approach for controlling electron dynamics with attosecond precision, these findings have potential applications in attosecond imaging, ultrafast spectroscopy, and quantum control. In particular, the possibility of manipulating electron interference is opened, which paves the way for investigating electron dynamics in atoms and molecules on ultrafast timescales, with far-reaching implications for quantum information processing, ultrafast chemistry, and advanced spectroscopic techniques.