Journal
PHYSICAL REVIEW A
Volume 100, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.100.063428
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Funding
- National Key Research and Development Program of China [2019YFA0307700, 2017YFA0403300]
- National Natural Science Foundation of China (NSFC) [11534004, 11627807, 11774175, 11774129, 11975012, 11604119]
- Jilin Provincial Research Foundation for Basic Research, China [20170101153JC]
- Science and Technology project of the Jilin Provincial Education Department [JJKH20190183KJ]
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The high-order harmonic generation process of H-2(+) in a co-rotating two-color circularly polarized laser pulse was investigated by numerically solving the time-dependent Schrodinger equation. Compared with the target of the atom, the harmonic intensity of H-2(+) is remarkably enhanced. Moreover, the harmonic intensity of H(2)(+)approaches its maximum when the electric field amplitude ratio of the fundamental frequency and the second one is approximately 1:2.3. By analyzing the evolution of the time-dependent wave packets, the enhancement of harmonic intensity may be attributed to an increase in the probability of the ionized electron recolliding with the parent ion. In addition, the dependence of harmonic intensity on the internuclear distance and the alignment angle of H-2(+) is explored. We found that the ellipticity of the particular harmonic order changes with the molecular alignment angle, which provides a chance to generate an extreme ultraviolet coherent light pulse with controllable polarization.
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