High-Order Harmonic Transient Grating Spectroscopy in a Molecular Jet | Zendy

Y. Mairesse | Zendy; D. Zeidler | Zendy; Nirit Dudovich | Zendy; M. Spanner | Zendy; J. Lévesque | Zendy; D. M. Villeneuve | Zendy; P. B. Corkum | Zendy

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High-Order Harmonic Transient Grating Spectroscopy in a Molecular Jet

Author(s) -

Y. Mairesse,

D. Zeidler,

Nirit Dudovich,

M. Spanner,

J. Lévesque,

D. M. Villeneuve,

P. B. Corkum

Publication year - 2008

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.100.143903

Subject(s) - grating , harmonics , excited state , high harmonic generation , physics , wave packet , excitation , optics , transient (computer programming) , harmonic , signal (programming language) , diffraction , atomic physics , spectroscopy , laser , acoustics , quantum mechanics , voltage , computer science , programming language , operating system

We study high-order harmonic generation in excited media using a four-wave-mixing-like configuration. We analyze the spatial profile of high harmonics emitted by a grating of rotationally excited molecules as a function of the pump-probe delay. We demonstrate a dramatic improvement in the contrast of the diffracted signal relative to the total high harmonic signal. This allows us to observe subtle effects in the rotational wave packet excitation such as the pump-intensity dependence of the wave packet dynamics. High harmonic transient grating spectroscopy can be extended to all forms of molecular excitation and to weak resonant excitation.Peer reviewed: YesNRC publication: Ye

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