The isotopic dependence and influence of driving laser intensity on the harmonic yields of diatomic molecule ions X2+

• DOI: 10.1016/j.cplett.2019.136965
• Publication Date: 2019-11-15T11:16:58Z
• Authors: Hang Liu; Yi Li; Liqiang Feng
• Keywords: Diatomic molecule; Intensity; Harmonic; Pulse duration; Harmonic spectrum

Abstract The harmonic yields from X2+ (including H2+, D2+ and T2+) driven by 800 nm laser with different laser intensities and pulse durations have been studied. At shorter pulse duration, the harmonic yields of X2+ follows as H2+ > D2+ > T2+, and the intensity difference is decreased as laser intensity increases. At longer pulse duration, the harmonic yields of X2+ follows as T2+ > D2+ > H2+, and the intensity difference is increased as laser intensity increases. Furthermore, the harmonic yield from X2+ can also be modulated by laser chirps. Finally, the physical mechanism is displayed clearly in ionization probability, internuclear distance and time-profile of harmonic emission.