Vortex electron generated by microwave photon with orbital angular momentum in a magnetic field

Abstract

With semi-quantum theory, we quantitatively deduce microwave photons radiated from the moving electrons in a magnetic field, as well as the interaction of transmitted microwave photons with the vortex electrons in the magnetic field. It shows that the Orbital Angular Momentum (OAM) transition between microwave photons and vortex electrons in the magnetic field occurs when the relativistic effect is considered. This work indicates an effective way to transfer OAM between microwave photons and vortex electrons theoretically. By the OAM microwave photon resonance absorption, different vortex electrons with radial and magnetic quantum numbers can be generated. Furthermore, vortex electrons can be detected to analyze the OAM carried by microwave photons.

Quantum electro-dynamics analysis of vortex electro-magnetic wave transmission with orbital angular momentum

“…磁场中电子在回旋振荡的同时, 与电磁波相互作用并辐射出携带OAM的 电磁波涡旋量子 [12] . 工程上一般可以通过回旋加速器实现这个过程 [9] . 在相互作用过程中, 根据角动量守恒, 电子的角动量传递给电磁波.…”

Promises and challenges of high-energy vortex states collisions

“…The electron moving in constant magnetic field exhibits discrete energy levels (Landau levels) and can jump between these levels by absorbing or emitting photons. In [183], this process was theoretically studied under the assumption that the microwave photons are themselves in a vortex state. Transitions between levels were calculated for non-relativistic and relativistic electrons, both in empty space and inside a matching microwave cavity, which can selectively enhance or suppress certain OAM transitions.…”

Multi-function terahertz wave manipulation utilizing Fourier convolution operation metasurface

“…[15][16][17][18][19] At present, most of the orbital angular momentum research is focused on the generation of vortex beams from microwave to optical wave regimes. [20][21][22][23][24][25] But, there are few literature on terahertz vortex beam generator. Furthermore, metasurface combined with Fourier convolution becomes more meaningful for terahertz vortex beam regulation.…”