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- W2977905263 abstract "An all-optical measurement of high-order fractional molecular echoes is demonstrated by using high-order harmonic generation (HHG). Excited by a pair of time-delayed short laser pulses, the signatures of full and high order fractional (1/2 and 1/3) alignment echoes are observed in the HHG signals measured from CO 2 molecules at various time delays of the probe pulse. By increasing the time delay of the pump pulses, much higher order fractional (1/4) alignment echo is also observed in N 2O molecules. With an analytic model based on the impulsive approximation, the spatiotemporal dynamics of the echo process are retrieved from the experiment. Compared to the typical molecular alignment revivals, high-order fractional molecular echoes are demonstrated to dephase more rapidly, which will open a new route towards the ultrashort-time measurement. The proposed HHG method paves an efficient way for accessing the high-order fractional echoes in molecules." @default.
- W2977905263 created "2019-10-10" @default.
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- W2977905263 date "2019-10-03" @default.
- W2977905263 modified "2023-10-15" @default.
- W2977905263 title "All-optical measurement of high-order fractional molecular echoes by high-order harmonic generation" @default.
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- W2977905263 doi "https://doi.org/10.1364/oe.27.030172" @default.
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- W2977905263 hasPublicationYear "2019" @default.
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