Present experiments cannot measure molecular frame photoelectron angular distributions (MFPAD) for ionization from the outermost valence orbitals of molecules. We show that the details of MFPAD can be retrieved with high-order harmonics generated by infrared lasers from aligned molecules. Using accurately calculated photoionization transition dipole moments for fixed-in-space molecules, we show that the dependence of the magnitude and phase of the high-order harmonics on the alignment angle of the molecules observed in recent experiments can be quantitatively reproduced. This result provides the needed theoretical basis for ultrafast dynamic chemical imaging using infrared laser pulses.
A. Le et al., "Probing Molecular Frame Photoionization Via Laser Generated High-Order Harmonics from Aligned Molecules," Physical Review Letters, vol. 102, no. 20, American Physical Society (APS), May 2009.
The definitive version is available at https://doi.org/10.1103/PhysRevLett.102.203001
Keywords and Phrases
Aligned Molecules; Alignment Angle; Chemical Imaging; Fixed-In-Space Molecule; High Order Harmonics; Infrared Laser; Infrared Laser Pulse; Molecular Frame; Photoelectron Angular Distributions; Photoionization Transitions; Theoretical Basis; Ultra-Fast Dynamics; Valence Orbitals, Angular Distribution; Harmonic Analysis; Infrared Devices; Molecules; Photoionization; Pulsed Laser Applications, Lasers
International Standard Serial Number (ISSN)
Article - Journal
© 2009 American Physical Society (APS), All rights reserved.
01 May 2009