Composite vortex air laser

doi:10.1038/s42005-025-01997-3

2025-02-19

DOI：10.1038/s42005-025-01997-3

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En 中文

Structured air laser generated through establishing high-gain air media in a cavity-free scheme by intense ultrashort pulses is promising for optical manipulation and quantum communication at standoff distances. However, the mechanism how the orbital angular momentum (OAM) information can be entangled into strong-field-induced gain media is still controversial, making manipulation of the topological charges of structured air laser remain a challenge. Here, we report the realization of a composite vortex N2+ air laser with controllable OAM by manipulating the relative positions, polarization directions, and intensity ratio between a Gaussian-shaped pump and an external vortex seed. Numerical simulations reveal the essential role of the interference between self-seeded Gaussian-shaped and externally-seeded vortex lasing emissions in the topological charge transformation. Our findings not only shed light on the generation mechanism of vortex air lasers, but also open up avenues for quantum manipulation of structured light through strong-field laser ionization of molecules remotely.

Keyword:

ORBITAL ANGULAR-MOMENTUM

LIGHT

期刊

Communications Physics

IF:

5.8

论文数:

2.8K

被引数:

9.2K

机构

Xidian University

学者数:

2.4W

论文数: 1.9W

被引数: 9.7K

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