Angular momentum properties of a circularly polarized vortex beam in the paraxial optical systems

The angular momentum (AM) properties of circularly polarized vortex beams (CPVBs) in two paraxial optical systems [free space and a gradient-index (GRIN) fiber] are demonstrated. The transverse light intensity, the longitudinal light intensity, the phase of the longitudinal electric field, the kinet...

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Bibliographic Details
Published in:Journal of the Optical Society of America. A, Optics, image science, and vision Optics, image science, and vision, 2024-11, Vol.41 (11), p.2231
Main Authors: Yin, Xiaojin, Li, Yu, Jin, Guoliang, Wang, Jing, Liu, Jinhong, Li, Jinhong
Format: Article
Language:English
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Summary:The angular momentum (AM) properties of circularly polarized vortex beams (CPVBs) in two paraxial optical systems [free space and a gradient-index (GRIN) fiber] are demonstrated. The transverse light intensity, the longitudinal light intensity, the phase of the longitudinal electric field, the kinetic momentum, the total spin AM (SAM), the transverse-type SAM ( -SAM), the longitudinal-type SAM ( -SAM), and the orbital angular momentum (OAM) of CPVBs in the two paraxial optical systems are characterized. Spin-orbit coupling of CPVBs is studied during propagation in free space and in a GRIN fiber. When the OAM and the SAM of a CPVB have the same direction of rotation and when they have opposite directions of rotation, the spin-orbit coupling exhibits different characteristics in free space and in the GRIN fiber.
ISSN:1084-7529
1520-8532
1520-8532
DOI:10.1364/JOSAA.541429