The orbital angular momentum of light (OAM) is the component of angular momentum of a light beam that is dependent on the field spatial distribution, and not on the polarization. OAM can be split into two types. The internal OAM is an origin-independent angular momentum of a light beam that can be associated with a helical or twisted wavefront.

In 1992, Allen et al. 16 proposed the orbital angular momentum (OAM) in vortex beams (VBs) where the OVs propagate in paraxial beams, which unveiled a new understanding of the connection between...

In optical fiber, the Orbital Angular Momentum (OAM) mode is a special mode with spatially infinite orthogonality. It provides a new multiplexing method to the communication capacity shortage problem and solves the complexity and high energy loss of OAM beams in space.

2019年10月19日 · 所谓OAM，它的宏观表现为电磁波的涡旋现象，具体为波束在垂直于传播方向上的平面内具有螺旋形的相位特征。 而OAM具有无穷多个模态，且各模态间相互正交，为涡旋波的通信及探测提供了天然的条件。 理论上，涡旋波可以无限的提升通信容量。 OAM可提供理论上无限多的具有不同量子态的正交基，用于承载信息可提高通信系统的数据容量，为高数据容量通信系统提供了足够的优势。 然而，实际上，OAM光束除了在传输过程中会引发光束尺寸变大、 …

Inspired by the recent scientific interest in harnessing the unique features of orbital angular momentum (OAM) for communications applications, we review the fu

2022年4月1日 · In this paper, the common beams carrying OAM are introduced, and the techniques of generating OAM beams in free space are summarized, including intracavity conversion method and extracavity conversion method. The application range of OAM beams studied at present is discussed, and the development trend of OAM beams is prospected.

2022年7月13日 · Standard vortex beams carrying different OAM (optical angular momentum) modes can provide independent communication channels for information transmission. However, they are unable to reach the...

2025年1月27日 · This work studies the generation of the orbital angular momentum (OAM) beam in the double quantum dot-metal nanoparticle (DQD-MNP) system under the application of the OAM beam.

The relationship between SAM and OAM can be explained by referring to the model of electron rotation around the nucleus: the momentum generated by the circular motion of electrons around the nucleus is equivalent to OAM, and the momentum generated by the spin of electrons is equivalent to SAM.

Orbital angular momentum (OAM) of electromagnetic waves is a field with a short history of less than thirty years. Recent advances in modern technology have paved the way for the development of systems that can generate OAM beams and have inspired scientists and engineers to investigate the possibility of using OAM in real‐life communications ...