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High order harmonic generation from SF6: Deconvolution of macroscopic effects.

B P Wilson1, K D Fulfer1, S Mondal2

  • 1Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA.

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|December 18, 2016
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Summary
This summary is machine-generated.

High-order harmonic generation in sulfur hexafluoride (SF6) reveals features independent of macroscopic conditions. Spectroscopic analysis attributes these features to the highest occupied molecular orbital (HOMO) and the next-highest occupied molecular orbital (HOMO-1).

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Area of Science:

  • Atomic and Molecular Physics
  • Quantum Optics
  • Chemical Physics

Background:

  • High-order harmonic generation (HHG) is a key process in strong-field physics.
  • Understanding the molecular orbital contributions to HHG is crucial for attosecond science.
  • Sulfur hexafluoride (SF6) presents a complex molecular system for studying HHG.

Purpose of the Study:

  • To investigate the influence of phase matching conditions on HHG from SF6.
  • To identify and assign spectroscopic features in the harmonic spectra.
  • To compare experimental results with quantitative rescattering theory.

Main Methods:

  • Experimental measurement of high-order harmonics from SF6.
  • Systematic variation of phase matching conditions.
  • Comparison of experimental data with theoretical predictions from quantitative rescattering theory.

Main Results:

  • Observed harmonic features largely independent of macroscopic phase matching conditions.
  • Successfully assigned spectroscopic features to specific molecular orbitals.
  • Identified contributions from the 1t1g (HOMO) and 5t1u (HOMO-1) orbitals.

Conclusions:

  • Macroscopic conditions have limited impact on certain HHG features in SF6.
  • Quantitative rescattering theory accurately describes HHG from SF6.
  • Spectroscopic analysis of HHG provides insights into molecular orbital structures.