Abstract
We demonstrate the variations of single harmonic resonance enhancement during high-order harmonics generation in zinc-containing atomic and molecular species at the conditions of single-color and two-color pumps of laser-induced plasmas by applying different laser sources. We show how selenides of this metal notably modify the enhancement of single (9th, 15th or 16th) harmonic compared with purely atomic zinc plasmas. The variations of single harmonic enhancement are demonstrated using fixed (806 nm) and tunable (1280–1440 nm) radiation.
Highlights
Sb), the where the gain ofwith single harmonics was proximity harmonicLIPs wavelength ion transitions a strong oscillator explained by the proximity of the harmonic wavelength and the ion transitions with strength
We have reconsidered the mechanism of resonant amplification of single harmonic in zinc-containing atomic and molecular plasmas when generating high-order harmonics in laser plasma plumes
It has been shown that selenides of this metal noticeably reduce the amplification of the single harmonic in comparison with purely atomic plasmas, probably due to the decrease of the oscillator strength of the involved ionic transitions
Summary
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