Below-Threshold High-Harmonic Spectroscopy with Aligned Hydrogen Molecular Ions

  • Fu-Yuan JengEmail author
  • Dmitry A. Telnov
  • Shih-I Chu
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 125)


We present fully ab initio three-dimensional (3D) calculations of high-order harmonic generations (HHG) of aligned hydrogen molecular ions, H\({}_{2}^{+}\), subject to intense linearly-polarized laser pulses. The numerical method is based on the high-precision time-dependent generalized pseudospectral method and the wavelet transform as the tool for time-frequency analysis. We show that the orientation of the molecular axis with respect to the polarization of the laser field strongly affect the electron returning times and below-threshold HHG dynamics. In this study, we find that the short (long) trajectories dominate the emission of below-threshold harmonics when the molecular axis is parallel (perpendicular) to the polarization vector of the laser field.


Time Profile Polarization Vector Laser Field Molecular Axis Prolate Spheroidal 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Department of PhysicsNational Taiwan UniversityTaipeiTaiwan (ROC)
  2. 2.Department of PhysicsSt. Petersburg State UniversitySt. PetersburgRussia
  3. 3.Department of ChemistryUniversity of KansasLawrenceUSA

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