The half Kapitza–Dirac effect following photoionization of molecules in intense standing-wave laser fields is studied. Photoelectron angular distributions (PADs) of molecules split towards the laser propagation and exhibit multiple splitting, which manifests the integer property of the ponderomotive parameter, as the laser intensity increases. The PADs are asymmetric about the laser polarization plane and vary with the molecular alignment as well as the kinetic energy of photoelectrons.
© 2010 Optical Society of America
Atomic and Molecular Physics
Original Manuscript: September 4, 2009
Revised Manuscript: February 15, 2010
Manuscript Accepted: February 18, 2010
Published: March 22, 2010
Xianghe Ren, Jingtao Zhang, Zhizhan Xu, and D.-S. Guo, "Angular splitting in half Kapitza-Dirac effect of H2+ molecules," J. Opt. Soc. Am. B 27, 714-718 (2010)