研究目的
Investigating the high-order harmonic generation process of H2+ in a co-rotating two-color circularly polarized laser pulse and exploring the enhancement of harmonic intensity and its dependence on the internuclear distance and alignment angle of H2+.
研究成果
The study demonstrates that the harmonic intensity of H2+ in a co-rotating two-color circularly polarized laser field can be significantly enhanced under specific conditions, such as an optimal electric field amplitude ratio. The enhancement is attributed to increased recollision probability of ionized electrons with the parent ion. Additionally, the harmonic ellipticity can be controlled by adjusting the molecular alignment angle, offering potential for generating extreme ultraviolet coherent light pulses with controllable polarization.
研究不足
The study is theoretical and relies on numerical simulations, which may not fully capture all physical phenomena observed in experimental settings. The applicability of the findings to other molecular systems or under different laser conditions is not explored.
1：Experimental Design and Method Selection:
The study employs the numerical solution of the time-dependent Schr?dinger equation (TDSE) to investigate the high-order harmonic generation (HHG) process of H2+ in a co-rotating two-color circularly polarized laser field. The methodology includes analyzing the evolution of time-dependent wave packets and classical trajectory analysis to understand the enhancement of harmonic intensity.
2：Sample Selection and Data Sources:
The study focuses on H2+ molecules and atoms for comparison, with specific attention to the internuclear distance and alignment angle of H2+.
3：2+.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: The primary tool is the numerical solution of the TDSE, with no specific physical equipment mentioned.
4：Experimental Procedures and Operational Workflow:
The process involves solving the TDSE for H2+ under the influence of a co-rotating two-color circularly polarized laser field, analyzing the harmonic spectra, and comparing the results with those from atoms and under different laser fields.
5：Data Analysis Methods:
The analysis includes calculating the harmonic spectra, examining the recollision probability of ionized electrons, and evaluating the effect of laser parameters on harmonic intensity and polarization.
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