Circularly polarized attosecond pulses generation from laser interaction with magnetized sub-critical plasmas. (1st June 2023)

• Record Type: Journal Article
• Authors: Pan, Chenhao; Wang, Jingwei; Luan, Shixia; Zhao, Yao; Leng, Yuxin; Li, Ruxin
• Is Part Of: Plasma physics and controlled fusion. Volume 65:Number 6(2023)
• Publication Date: 2023-06-01
• Subjects: circularly polarized attosecond pulses -- magnetized sub-critical plasmas -- plasma surface high-harmonics; Plasma (Ionized gases) -- Periodicals; Controlled fusion -- Periodicals; 530.44
• DOI: 10.1088/1361-6587/accd1b
• Languages: English
• ISSNs: 0741-3335

Abstract

Abstract: We propose a method to generate circularly polarized (CP) attosecond pulses by the interactions of a relativistic-intensity right-hand CP laser pulse and magnetized sub-critical plasma. It is theoretically and numerically demonstrated that when an external magnetic field with an appropriate strength is applied to a sub-critical plasma along the laser propagation, the ponderomotive force of a right-hand CP laser at the vacuum-plasma boundary is significantly enhanced. The electrons are then steadily pushed forward until the timely-increasing charge separation field becomes strong enough to pull them back, forming a dense and counter-moving electron sheet. The relativistic-velocity electron sheet works as a flying mirror to compress the tail of the driving laser and efficiently generate a single CP attosecond pulse. The present scheme shows a stable efficiency on different scale lengths of preplasma and thus may provide a robust way to generate bright and CP attosecond pulses.