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High-order harmonic generation from field-free aligned molecules has been measured as a function of the angle between polarization directions of femtosecond pump and probe pulses. The results are compared with the recent theoretical prediction for N2, O2 and CO2 molecules.
This paper discusses rotational coherence created in wave packets of N2, O2 and CO2 with intense ultrashort laser pulses and observed with high-order harmonic generation. We identify the origin of several sets of frequency component included in the time-dependent harmonic signal and its effect on the revival structure.
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