We report applications of the quantitative rescattering theory (QRS) for calculation of high-order-harmonic generation (HHG) from polyatomic molecules in ultrashort linearly polarized intense laser pulses, using the example of the CCl₄ molecule. In particular, we present a detailed analysis and a treatment for the phase of the electron returning wave packet, which recollides with the parent molecular ion to emit high-energy photons. Our results show that Cooper-type minimum structures in the molecular photoionization cross section lead to quite distinguishable minima in the HHG spectra, even for unaligned polyatomic molecules.
A. Le et al., "Quantitative Rescattering Theory of High-Order Harmonic Generation for Polyatomic Molecules," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 87, no. 6, American Physical Society (APS), Jun 2013.
The definitive version is available at https://doi.org/10.1103/PhysRevA.87.063406
Keywords and Phrases
High Energy Photons; High Order Harmonic Generation; Intense Laser Pulse; Linearly Polarized; Minimum Structures; Molecular Ions; Molecular Photoionization; Polyatomic Molecules, Harmonic Generation, Molecules
International Standard Serial Number (ISSN)
Article - Journal
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