Attosecond probing of nuclear dynamics with trajectory-resolved high-harmonic spectroscopy

Abstract

We report attosecond-scale probing of the laser-induced dynamics in molecules. We apply the method of high-harmonic spectroscopy, where laser-driven recolliding electrons on various trajec- tories record the motion of their parent ion. Based on the transient phase-matching mechanism of high-order harmonic generation, short and long trajectories contributing to the same harmonic order are distinguishable in both the spatial and frequency domains, giving rise to a one-to-one map between time and photon energy for each trajectory. The short and long trajectories in H2 and D2 are used simultaneously to retrieve the nuclear dynamics on the attosecond and angstrom scale. Compared to using only short trajectories, this extends the temporal range of the measurement to one optical cycle. The experiment is also applied to methane and ammonia molecules.

6 pages, 5 figures .To be published in Physical Review Letter

References in corpus (1)

• The effect of dressing on high-order harmonic generation in vibrating H${}_2$ molecules

Cited by in corpus (5)

• High-order harmonic generation of doped semiconductor
• Molecular rotation movie filmed with high-harmonic generation
• Attomicroscopy: from Femtosecond to Attosecond Electron Microscopy
• All-optical measurement of high-order fractional molecular echoes by high-order harmonic generation
• Full-dimensional treatment of short-time vibronic dynamics in molecular high-harmonics generation process in methane