High harmonics generation in atoms and molecules using ultrashort laser pulses in the multiphoton regime

摘要

Summary form only given. We studied high harmonic generation in jets of atomic gases Ar and Xe as well as diatomic molecular gases H/sub 2/, D/sub 2/, N/sub 2/, and O/sub 2/ using a linearly polarized picosecond dye laser (594nm) and a linearly polarized subpicosecond Ti:sapphire/Nd:glass laser (1053nm). The harmonic conversion efficiencies are compared by choosing different gas pairs as a function of three parameters: (1) field-free ionization potential (2) mass and (3) static average polarizability.