Classical Modeling of High-Order Harmonic Spectroscopy using an Elliptically Polarized Laser Field

ORAL

Abstract

We model high harmonic generation (HHG) from atoms in elliptically polarized fields with purely classical electron trajectories initialized from a microcanonical ensemble. The trajectories are calculated in the presence of an atomic core potential and an elliptically polarized driving laser field. This numerical scheme allows the determination of the overall shape of the HHG spectrum from the statistics of electrons that return to the ionic core. We find that the threshold ellipticity, which is defined by the ellipticity where the relative intensity of a harmonic drops to 10{\%} with respect to linear polarization, decreases as the harmonic order increases for both ``short'' and ``long'' trajectories. Our results also show that the presence of an atomic core potential can give rise to two possible sets of trajectories that return to the core with the same energy and at same time but that ionized at different times, a feature that is absent in the strong field approximation description of HHG.

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Authors

  • Paul Abanador

    Louisiana State Univ - Baton Rouge

  • Richard Longland

    University of Tennessee, Knoxville, University of Alabama at Birmingham, Rutgers, The State University of New Jersey, Florida Intl Univ, Christopher Newport University, Jefferson Laboratory, University of North Georgia, Dahlonega GA 30597, Oak Ridge National Laboratory, Oak Ridge, TN 37831, Austin Peay State University department of physics and astronomy, Laboratoire des Verres et et Ceramiques, Institute des Sciences chimiques de Rennes, Austin Peay State University Department of Physics and Astronomy, Université de Rennes, Lehigh University, Austin Peay State University, University of Alabama, Oak Ridge National Laboratory, Auburn University, Auburn, AL, Purdue University, West Lafayette, IN, Queen's University Belfast, Belfast, United Kingdom, Harvard Smithsonian Center for Astrophysics, Boston, MA, Francis Marion University, Auburn University, Lawrence Berkeley National Laboratory, University of California, Davis, University of Alabama Huntsville, Oak Ridge National Lab, Univ of Tennessee, Knoxville, Oak Ridge National Lab, Univ of Tennessee, Knoxville, ITEP, Moscow, Baylor University, Saint Louis University, Louisiana State Univ - Baton Rouge, University of Chicago, Oak Ridge National Laboratory , Oak Ridge TN 37831, American Superconductor Corp., Westborough, MA 01581, USA, Tsinghua University, LBNL, Vanderbilt University, Laboratoire Aime Cotton, CNRS/Universite Paris-Sud/ENS-Cachan, Orsay France, Drake University, Des Moines, IA, University of Central Florida, University of South Alabama, North Carolina Central University

  • Richard Longland

    University of Tennessee, Knoxville, University of Alabama at Birmingham, Rutgers, The State University of New Jersey, Florida Intl Univ, Christopher Newport University, Jefferson Laboratory, University of North Georgia, Dahlonega GA 30597, Oak Ridge National Laboratory, Oak Ridge, TN 37831, Austin Peay State University department of physics and astronomy, Laboratoire des Verres et et Ceramiques, Institute des Sciences chimiques de Rennes, Austin Peay State University Department of Physics and Astronomy, Université de Rennes, Lehigh University, Austin Peay State University, University of Alabama, Oak Ridge National Laboratory, Auburn University, Auburn, AL, Purdue University, West Lafayette, IN, Queen's University Belfast, Belfast, United Kingdom, Harvard Smithsonian Center for Astrophysics, Boston, MA, Francis Marion University, Auburn University, Lawrence Berkeley National Laboratory, University of California, Davis, University of Alabama Huntsville, Oak Ridge National Lab, Univ of Tennessee, Knoxville, Oak Ridge National Lab, Univ of Tennessee, Knoxville, ITEP, Moscow, Baylor University, Saint Louis University, Louisiana State Univ - Baton Rouge, University of Chicago, Oak Ridge National Laboratory , Oak Ridge TN 37831, American Superconductor Corp., Westborough, MA 01581, USA, Tsinghua University, LBNL, Vanderbilt University, Laboratoire Aime Cotton, CNRS/Universite Paris-Sud/ENS-Cachan, Orsay France, Drake University, Des Moines, IA, University of Central Florida, University of South Alabama, North Carolina Central University

  • Richard Longland

    University of Tennessee, Knoxville, University of Alabama at Birmingham, Rutgers, The State University of New Jersey, Florida Intl Univ, Christopher Newport University, Jefferson Laboratory, University of North Georgia, Dahlonega GA 30597, Oak Ridge National Laboratory, Oak Ridge, TN 37831, Austin Peay State University department of physics and astronomy, Laboratoire des Verres et et Ceramiques, Institute des Sciences chimiques de Rennes, Austin Peay State University Department of Physics and Astronomy, Université de Rennes, Lehigh University, Austin Peay State University, University of Alabama, Oak Ridge National Laboratory, Auburn University, Auburn, AL, Purdue University, West Lafayette, IN, Queen's University Belfast, Belfast, United Kingdom, Harvard Smithsonian Center for Astrophysics, Boston, MA, Francis Marion University, Auburn University, Lawrence Berkeley National Laboratory, University of California, Davis, University of Alabama Huntsville, Oak Ridge National Lab, Univ of Tennessee, Knoxville, Oak Ridge National Lab, Univ of Tennessee, Knoxville, ITEP, Moscow, Baylor University, Saint Louis University, Louisiana State Univ - Baton Rouge, University of Chicago, Oak Ridge National Laboratory , Oak Ridge TN 37831, American Superconductor Corp., Westborough, MA 01581, USA, Tsinghua University, LBNL, Vanderbilt University, Laboratoire Aime Cotton, CNRS/Universite Paris-Sud/ENS-Cachan, Orsay France, Drake University, Des Moines, IA, University of Central Florida, University of South Alabama, North Carolina Central University

  • Richard Longland

    University of Tennessee, Knoxville, University of Alabama at Birmingham, Rutgers, The State University of New Jersey, Florida Intl Univ, Christopher Newport University, Jefferson Laboratory, University of North Georgia, Dahlonega GA 30597, Oak Ridge National Laboratory, Oak Ridge, TN 37831, Austin Peay State University department of physics and astronomy, Laboratoire des Verres et et Ceramiques, Institute des Sciences chimiques de Rennes, Austin Peay State University Department of Physics and Astronomy, Université de Rennes, Lehigh University, Austin Peay State University, University of Alabama, Oak Ridge National Laboratory, Auburn University, Auburn, AL, Purdue University, West Lafayette, IN, Queen's University Belfast, Belfast, United Kingdom, Harvard Smithsonian Center for Astrophysics, Boston, MA, Francis Marion University, Auburn University, Lawrence Berkeley National Laboratory, University of California, Davis, University of Alabama Huntsville, Oak Ridge National Lab, Univ of Tennessee, Knoxville, Oak Ridge National Lab, Univ of Tennessee, Knoxville, ITEP, Moscow, Baylor University, Saint Louis University, Louisiana State Univ - Baton Rouge, University of Chicago, Oak Ridge National Laboratory , Oak Ridge TN 37831, American Superconductor Corp., Westborough, MA 01581, USA, Tsinghua University, LBNL, Vanderbilt University, Laboratoire Aime Cotton, CNRS/Universite Paris-Sud/ENS-Cachan, Orsay France, Drake University, Des Moines, IA, University of Central Florida, University of South Alabama, North Carolina Central University