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Abstract: We demonstrate how the shape of femtosecond laser pulses can be tailored inorder to obtain maximal ionization of atoms or molecules. For that purpose, wehave overlayed a direct-optimization scheme on top of a fully unconstrainedcomputation of the three-dimensional time-dependent Schrodinger equation. Theprocedure looks for pulses that maintain the same total length and integratedintensity or fluence as a given pulse that serves as an initial guess. Itallows, however, for changes in frequencies - within a certain, predefinedrange - and overall shape, leading to enhanced ionization. We illustrate thescheme by calculating ionization yields for the H2+ molecule when irradiatedwith short ~5 fs, high-intensity laser pulses.



Author: A. Castro, E. Rasanen, A. Rubio, E. K. U. Gross

Source: https://arxiv.org/







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