Laser induced electron diffraction: a tool for molecular orbital imaging

Details Laser induced electron diffraction: a tool for molecular orbital imaging Laser induced electron diffraction: a tool for molecular orbital imaging

2012-03-18

arxiv.org/abs/1203.3922v1

Physics

Atomic Physics

Scientific paper

We explore the laser-induced ionization dynamics of N2 and CO2 molecules subjected to a few-cycle, linearly polarized, 800\,nm laser pulse using effective two-dimensional single active electron time-dependent quantum simulations. We show that the electron recollision process taking place after an initial tunnel ionization stage results in quantum interference patterns in the energy resolved photo-electron signals. If the molecule is initially aligned perpendicular to the field polarization, the position and relative heights of the associated fringes can be related to the molecular geometrical and orbital structure, using a simple inversion algorithm which takes into account the symmetry of the initial molecular orbital from which the ionized electron is produced. We show that it is possible to extract inter-atomic distances in the molecule from an averaged photon-electron signal with an accuracy of a few percents.

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