scholarly journals Three-Dimensional Simultaneous Arbitrary-Way Orbital Angular Momentum Generator Based on Transformation Optics

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Chen Zhang ◽  
Li Deng ◽  
Wei Jun Hong ◽  
Wei Xiang Jiang ◽  
Jian Feng Zhu ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Three Dimensional ◽  
Transformation Optics

scholarly journals Vortex states in an acoustic Weyl crystal with a topological lattice defect

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Qiang Wang ◽  
Yong Ge ◽  
Hong-xiang Sun ◽  
Haoran Xue ◽  
Ding Jia ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Lattice Defect ◽  
Three Dimensional ◽  
Surface States ◽  
Real Space ◽  
Lattice Defects ◽  
One Dimensional ◽  
Topological Features ◽  
Topological Lattice

AbstractCrystalline materials can host topological lattice defects that are robust against local deformations, and such defects can interact in interesting ways with the topological features of the underlying band structure. We design and implement a three dimensional acoustic Weyl metamaterial hosting robust modes bound to a one-dimensional topological lattice defect. The modes are related to topological features of the bulk bands, and carry nonzero orbital angular momentum locked to the direction of propagation. They span a range of axial wavenumbers defined by the projections of two bulk Weyl points to a one-dimensional subspace, in a manner analogous to the formation of Fermi arc surface states. We use acoustic experiments to probe their dispersion relation, orbital angular momentum locked waveguiding, and ability to emit acoustic vortices into free space. These results point to new possibilities for creating and exploiting topological modes in three-dimensional structures through the interplay between band topology in momentum space and topological lattice defects in real space.

scholarly journals Evolution of orbital angular momentum in three-dimensional structured light

2018 ◽  
Vol 98 (4) ◽  
Author(s):  
Ahmed H. Dorrah ◽  
Carmelo Rosales-Guzmán ◽  
Andrew Forbes ◽  
Mo Mojahedi
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Structured Light ◽  
Three Dimensional

scholarly journals Three‐dimensional profiling of collimated radio‐frequency orbital angular momentum beams

2020 ◽  
Vol 14 (6) ◽  
pp. 547-550
Author(s):  
Joshua K. Hamilton ◽  
Simon J. Berry ◽  
Joseph H. Spencer ◽  
Christopher R. Lawrence ◽  
Francis C. Smith ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Radio Frequency ◽  
Orbital Angular Momentum ◽  
Three Dimensional

100  Tbit/s free-space data link enabled by three-dimensional multiplexing of orbital angular momentum, polarization, and wavelength

2014 ◽  
Vol 39 (2) ◽  
pp. 197 ◽  
Author(s):  
Hao Huang ◽  
Guodong Xie ◽  
Yan Yan ◽  
Nisar Ahmed ◽  
Yongxiong Ren ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Free Space ◽  
Three Dimensional ◽  
Data Link ◽  
Space Data

Three-dimensional measurements of a millimeter wave orbital angular momentum vortex

2014 ◽  
Vol 39 (3) ◽  
pp. 626 ◽  
Author(s):  
Peter Schemmel ◽  
Stefania Maccalli ◽  
Giampaolo Pisano ◽  
Bruno Maffei ◽  
Ming Wah Richard Ng
Keyword(s):  
Angular Momentum ◽  
Millimeter Wave ◽  
Orbital Angular Momentum ◽  
Three Dimensional ◽  
Dimensional Measurements

scholarly journals Analogies between optical and quantum mechanical angular momentum

2017 ◽  
Vol 375 (2087) ◽  
pp. 20150443 ◽  
Author(s):  
Gerard Nienhuis
Keyword(s):  
Wave Function ◽  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Quantum Particle ◽  
Three Dimensional ◽  
Propagation Direction ◽  
Linear Operators ◽  
Quantum Mechanical ◽  
Wave Optics ◽  
Quantum Harmonic Oscillator

The insight that a beam of light can carry orbital angular momentum (AM) in its propagation direction came up in 1992 as a surprise. Nevertheless, the existence of momentum and AM of an electromagnetic field has been well known since the days of Maxwell. We compare the expressions for densities of AM in general three-dimensional modes and in paraxial modes. Despite their classical nature, these expressions have a suggestive quantum mechanical appearance, in terms of linear operators acting on mode functions. In addition, paraxial wave optics has several analogies with real quantum mechanics, both with the wave function of a free quantum particle and with a quantum harmonic oscillator. We discuss how these analogies can be applied. This article is part of the themed issue ‘Optical orbital angular momentum’.

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