We present theoretical calculations of high-order-harmonic generation (HHG) from stereoisomers of 1,2-dichloroethylene (C₂H₂Cl₂) and 2-butene (C₄H₈) based on the quantitative rescattering theory. Our results show that the HHG spectra from these cis and trans isomers with intense midinfrared laser pulses are clearly distinguishable, even when the molecules are randomly oriented, in good agreement with the recent experiments by Wonget al. [Phys. Rev. A 84, 051403(R) (2011)]. We found that the angle-averaged tunneling ionization yields and photoionization cross sections from the cis and trans isomers for both molecules are nearly identical. The origin of the differences in HHG spectra is traced as due to the interplay in the angular dependence of the photoionization (or photorecombination) cross section and ionization rate.
A. Le et al., "High-Order-Harmonic Generation from Molecular Isomers with Midinfrared Intense Laser Pulses," Physical Review A - Atomic, Molecular, and Optical Physics, vol. 88, no. 2, American Physical Society (APS), Aug 2013.
The definitive version is available at https://doi.org/10.1103/PhysRevA.88.021402
Keywords and Phrases
Angular Dependence; Cis And Trans Isomers; Intense Laser Pulse; Mid-Infrared Laser Pulse; Photoionization Cross Section; Photorecombination; Theoretical Calculations; Tunneling Ionization, Isomers; Laser Pulses; Molecules; Photoionization; Stereochemistry, Harmonic Generation
International Standard Serial Number (ISSN)
Article - Journal
© 2013 American Physical Society (APS), All rights reserved.
01 Aug 2013