Observation of laser-induced electronic structure in oriented polyatomic molecules
Tolstikhin, Oleg I.
Bisgaard, Christer Z.
Madsen, Lars B.
Wörner, Hans Jakob
- Journal Article
Rechte / LizenzCreative Commons Attribution 4.0 International
All attosecond time-resolved measurements have so far relied on the use of intense near-infrared laser pulses. In particular, attosecond streaking, laser-induced electron diffraction and high-harmonic generation all make use of non-perturbative light–matter interactions. Remarkably, the effect of the strong laser field on the studied sample has often been neglected in previous studies. Here we use high-harmonic spectroscopy to measure laser-induced modifications of the electronic structure of molecules. We study high-harmonic spectra of spatially oriented CH3F and CH3Br as generic examples of polar polyatomic molecules. We accurately measure intensity ratios of even and odd-harmonic orders, and of the emission from aligned and unaligned molecules. We show that these robust observables reveal a substantial modification of the molecular electronic structure by the external laser field. Our insights offer new challenges and opportunities for a range of emerging strong-field attosecond spectroscopies. Mehr anzeigen
Zeitschrift / SerieNature Communications
Seiten / Artikelnummer
VerlagNature Publishing Group
Organisationseinheit02515 - Laboratorium für Physikalische Chemie / Laboratory of Physical Chemistry
03888 - Wörner, Hans Jakob / Wörner, Hans Jakob