Abstract

We present an ab initio quantum study of below-threshold harmonic generation (BTHG) from H2 + molecules in the presence of an intense laser field by solving the time-dependent Schrödinger equation accurately in space and time. We find that multiple channels contribute to BTHG of H2 + molecules, which are related to the electron driven initially at specific time of the laser pulse from one nuclear core to another nuclear core or back to the parent core itself. The distinct contributions of these channels are distinguished by using a novel synchro squeezing time-frequency analysis.

Details

Title
Dynamical origin of below-threshold harmonic generation of diatomic molecules
Author
P-C, Li 1 ; Zhou, X-X 2 ; S-I, Chu 3 

 Department of Physics, College of Science, Shantou University, Shantou, Guangdong 515063, China 
 College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China 
 Department of Chemistry, University of Kansas, Lawrence, Kansas 66045, USA 
Publication year
2020
Publication date
Jan 2020
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2568319351
Copyright
© 2020. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.