The Generation of Circularly Polarized Isolated Attosecond Pulses with Tunable Helicity from CO Molecules in Polarization Gating Laser Fields

Author:

Chen Shiju1,Yuan Hua1,Wang Feng2,Song Jiahang1,Zhao Yue1ORCID,Yang Chunhui2,Ou Tianxin2,Zhang Ru2,Chang Qiang1,Sun Yuping1ORCID

Affiliation:

1. School of Physics and Optoelectronic Engineering, Shandong University of Technology, Zibo 255049, China

2. Hubei Key Laboratory of Optical Information and Pattern Recognition, Wuhan Institute of Technology, Wuhan 430205, China

Abstract

We theoretically demonstrate a scheme to generate circularly polarized (CP) isolated attosecond pulses (IAPs) with tunable helicity using a polarization gating laser field interacting with the CO molecule. The results show that a broadband CP supercontinuum is produced from the oriented CO molecule, which supports the generation of an IAP with an ellipticity of 0.98 and a duration of 90 as. Furthermore, the helicity of the generated harmonics and IAP can be effectively controlled by modulating the laser field and the orientation angle of the CO molecule. Our method will advance research on chiral-specific dynamics and magnetic circular dichroism on the attosecond timescale.

Funder

National Natural Science Foundation of China

Campus Science Foundation Research Project of Wuhan Institute of Technology, China

Publisher

MDPI AG

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