Tomographic Imaging of Molecular Orbitals in Length and Velocity Form

Journal Article · Thu Nov 29 04:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2827043· OSTI ID:21049427

Zwan, Elmar V. van der; Lein, Manfred ^[1]

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1. Institute for Physics, University of Kassel, Heinrich-Plett-Strasse 40, 34132 Kassel (Germany)

Recently Itatani et al. [Nature 432, 876 (2004)] introduced the new concept of molecular orbital tomography, where high harmonic generation (HHG) is used to image electronic wave functions. We describe an alternative reconstruction form, using momentum instead of dipole matrix elements for the electron recombination step in HHG. We show that using this velocity-form reconstruction, one obtains better results than using the original length-form reconstruction. We provide numerical evidence for our claim that one has to resort to extremely short pulses to perform the reconstruction for an orbital with arbitrary symmetry. The numerical evidence is based on the exact solution of the time-dependent Schroedinger equation for 2D model systems to simulate the experiment. Furthermore we show that in the case of cylindrically symmetric orbitals, such as the N{sub 2} orbital that was reconstructed in the original work, one can obtain the full 3D wave function and not only a 2D projection of it.

• OSTI ID: 21049427
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 963; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DIPOLES
ELECTRONS
EXACT SOLUTIONS
HARMONIC GENERATION
IMAGES
LENGTH
MATRIX ELEMENTS
MOLECULAR ORBITAL METHOD
PULSES
RECOMBINATION
SCHROEDINGER EQUATION
SYMMETRY
TIME DEPENDENCE
TOMOGRAPHY
VELOCITY
WAVE FUNCTIONS