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.

2024年6月1日 · Based on the OAM character of spin wave, an electromagnetic waveform with SAM in the center and SAM-OAM beside is demonstrated. In addition, since spin wave carries OAM naturally, a spin–orbit coupling mechanism is performed, which demands no spin Pancharatnam–Berry phase nor any phase modulation structure.

2025年3月22日 · Generation of three-dimensional (3D) spatiotemporal (ST) vortices with longitudinal and transverse orbital angular momentum (OAM) Assuming that all wave packets propagate along the \ (z\) -axis ...

2017年7月4日 · Orbital Angular Momentum (OAM) is a typical spatial mode of an Electro-Magnetic (EM) wave. Correctly detecting the OAM mode is fundamental and of foremost importance...

2021年2月1日 · Antenna array is one of the methods which can generate Orbital Angular Momentum (OAM) waves. However, OAM waves generated by different antenna arrays have different characteristics of Electric-field (E-field) components’ distribution and radiation patterns.

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 ...

2019年11月8日 · In this paper, we comprehensively summarize and compare the methods for generation and detection of optical OAM, radio OAM and acoustic OAM. Then, we represent the applications and technical challenges of OAM in communications, including free-space optical communications, optical fiber communications, radio communications and acoustic ...

2025年3月24日 · Current orbital angular momentum (OAM) combs generating technology is hindered by bulky optical systems, limited control, and lack of multicolored information, impeding system integration and practical applications. We present a metasurface approach to realizing multicolored OAM comb engineering along the light propagation direction. The OAM combs are measured based on the intensity of bright ...

3 天之前 · As a new radio wave carrying orbital angular momentum (OAM), the vortex beam brings a breakthrough to the radar system. To better apply the vortex wav…

4 天之前 · The three-wave phase matching condition allows for coupling between the two excited states, with the transition occurring in the microwave frequency regime. We assume that one of these electromagnetic fields in the visible regime possesses the LG …