Strong field effects in rotational femtosecond degenerate four-wave mixing.
作者： Maxim F. Gelin , Christoph Riehn , Maksim Kunitski , Bernhard Brutschy
DOI: 10.1063/1.3367726
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摘要: We study theoretically strong field effects in rotational femtosecond degenerate four-wave-mixing (DFWM). First, we developed a perturbative approach and calculated the leading correction to standard (weak field) formula for DFWM signal. Second, constructed nonperturbative computing signals excited by (short) pulses of arbitrary intensity. Third, worked out theory describe with an extra aligning pulse. show that strong-pulse-induced nonadiabatic alignment does explain many experimentally detected features develop increasing laser intensity beyond weak regime. However, also this cannot solely be responsible onset heterodyne detection pronounced constant background high pulses.
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