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Chin. Phys. B, 2014, Vol. 23(10): 103302    DOI: 10.1088/1674-1056/23/10/103302
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Nonsequential double ionization of diatomic molecules by elliptically polarized laser pulses

Tong Ai-Hong (童爱红), Liu Dan (刘丹), Feng Guo-Qiang (冯国强)
Department of Physics and Mechanical & Electrical Engineering, Hubei University of Education, Wuhan 430205, China
Abstract  Using the classical ensemble method, we investigate nonsequential double ionization (NSDI) of diatomic molecules by elliptically polarized laser pulses. The results show that the ellipticity of the laser field has a strong suppression effect on NSDI probabilities both in parallel and perpendicular alignments. The double ionization (DI) channel is commonly dominated by NSDI, and the NSDI channel changes with ellipticity. As ellipticity increases, more and more NSDIs occur through recollision excitation with subsequent field ionization (RESI). Moreover, like the case of linear polarization, the two electrons involved in NSDI for perpendicularly aligned molecules are more likely to emit into the opposite hemispheres as compared to the case of parallel alignment. Additionally, this alignment effect increases as ellipticity increases.
Keywords:  nonsequential double ionization      electron correlation      molecular alignment effect  
Received:  20 November 2013      Revised:  21 April 2014      Accepted manuscript online: 
PACS:  33.80.Rv (Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states))  
  33.80.Wz (Other multiphoton processes)  
  34.80.Gs (Molecular excitation and ionization)  
Fund: Project supported by the Fund for Excellent Youths of Education Department of Hubei Province, China (Grant No. Q20133001), the Natural Science Foundation of Hubei Province, China (Grant No. 2013CFB015), and the Special Fund of Theoretical Physics, China (Grant No. 11347189).
Corresponding Authors:  Tong Ai-Hong     E-mail:  tah1979@126.com
About author:  33.80.Rv; 33.80.Wz; 34.80.Gs

Cite this article: 

Tong Ai-Hong (童爱红), Liu Dan (刘丹), Feng Guo-Qiang (冯国强) Nonsequential double ionization of diatomic molecules by elliptically polarized laser pulses 2014 Chin. Phys. B 23 103302

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