Generation and Focusing of Orbital Angular Momentum Based on Polarized Reflectarray at Microwave Frequency

Study on Generation of Higher Order Orbital Angular Momentum Modes and Parameters Affecting the Vortex

In this manuscript, higher-order Orbital Angular Momentum (OAM) modes and parameters affecting vortex in the radiation pattern have been studied. A uniform circular array resonating at 10 GHz frequency is formed using eight identical rectangular patch antennas. Three uniform circular arrays are analyzed, simulated, and fabricated for OAM modes 0, +1, and -1 respectively. The higher-order OAM mo...

Generation and detection of broadband multi-channel orbital angular momentum by micrometer-scale meta-reflectarray.

We theoretically demonstrate the generation and detection of broadband multi-channel Orbital Angular Momentum(OAM) by a micrometer-scale meta-reflectarray. The meta-reflectarray composed of patterned silicon bars on a silver ground plane can be designed to realize phase modulation and work as chip-level OAM devices. Compared to traditional methods of OAM generation and detection, our approach s...

Microwave imaging of spinning object using orbital angular momentum

Probing the Orbital Angular momentum through the Polarized Gluon Asymmetry

The orbital angular momentum is one of the least understood of the spin characteristics of a proton. There are no direct ways to model Lz. However, the Jz = 1 2 sum rule includes an angular momentum component and can provide indirect access to properties of Lz. One of the other unknowns in the sum rule is the gluon polarization, ∆G. We can define the gluon spin asymmetry in a proton as A(x,Q2) ...

Probing Parton Orbital Angular Momentum in Longitudinally Polarized Nucleon

Xiangdong Ji, 2, 3 Xiaonu Xiong, 4 and Feng Yuan INPAC, Department of Physics, and Shanghai Key Lab for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China Center for High-Energy Physics, Peking University, Beijing, 100080, P. R. China Maryland Center for Fundamental Physics, University of Maryland, College Park, Maryland 20742, USA Nuclear Science Divis...