Measuring the complex recombination dipole of aligned CO2molecules in high-order harmonic generation

S. Haessler, W. Boutu, H. Merdji, P. Breger, R. Taïeb, J. Caillat, A. Maquet, P. Monchicourt, B. Carré, P. Salières
2009 UVX 2008 - 9e Colloque sur les Sources Cohérentes et Incohérentes UV, VUV et X : Applications et Développements Récents   unpublished
We generate high order harmonics in aligned CO 2 molecules and measure the spectral amplitudes and phases as a function of the alignment angle. We control the quantum interference occurring in the recombination of an ultrafast laser-driven electron wavepacket with the highest occupied molecular orbital of CO 2 . By comparing to the emission of the reference system krypton, we obtain an experimental measure of the complex recombination dipole matrix element between the CO 2 HOMO and a continuum
more » ... tate. The measured phase jump contains signatures of Coulombic wavepacket distortion.
doi:10.1051/uvx/2009011 fatcat:6v65xfh2bbcgbp5yfp4kmvvjjm