Generation of Intense High-Order Vortex Harmonics

Abstract

This paper presents the method for the first time to generate intense high-order optical vortices that carry orbital angular momentum in the extreme ultraviolet region. In three-dimensional particle-in-cell simulation, both the reflected and transmitted light beams include high-order harmonics of the Laguerre-Gaussian (LG) mode when a linearly polarized LG laser pulse impinges on a solid foil. The mode of the generated LG harmonic scales with its order, in good agreement with our theoretical analysis. The intensity of the generated high-order vortex harmonics is close to the relativistic region, and the pulse duration can be in attosecond scale. The obtained intense vortex beam possesses the combined properties of fine transversal structure due to the high-order mode and the fine longitudinal structure due to the short wavelength of the high-order harmonics. Thus, the obtained intense vortex beam may have extraordinarily promising applications for high-capacity quantum information and for high-resolution detection in both spatial and temporal scales because of the addition of a new degree of freedom.

References in corpus (6)

• Theory of high harmonic generation in relativistic laser interaction with overdense plasma
• Attosecond XUV vortices from high-order harmonic generation
• Transferring orbital and spin angular momenta of light to atoms
• Light fan driven by relativistic laser pulse
• Efficient generation of an isolated single-cycle attosecond pulse
• On Exchange of Orbital Angular Momentum Between Twisted Photons and Atomic Electrons

Cited by in corpus (2)

• Plasma q-plate for generation and manipulation of intense optical vortices
• Optical vortices discern attosecond time delay in electron emission from magnetic sublevels