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Precise Access to the Molecular-Frame Complex Recombination Dipole through High-Harmonic Spectroscopy

Title: 

Precise Access to the Molecular-Frame Complex Recombination Dipole through High-Harmonic Spectroscopy

Authors: 
S. B. Schoun, A. Camper, P. Salières, R. R. Lucchese, P. Agostini, and L. F. DiMauro
Abstract: 

We report on spectral intensity and group delay measurements of the highest-occupied molecular-orbital (HOMO) recombination dipole moment of N2 in the molecular-frame using high harmonic spectroscopy. We take advantage of the long-wavelength 1.3  μm driving laser to isolate the HOMO in the near threshold region, 19–67 eV. The precision of our group delay measurements reveals previously unseen angle-resolved spectral features associated with autoionizing resonances, and allows quantitative comparison with cutting-edge correlated 8-channel photoionization dipole moment calculations.

Year: 
2017
Journal: 
Phys. Rev. Lett. 118, 033201
Keywords: 
Attosecond
High Harmonic Generation