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

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 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

Generating multiple orbital angular momentum vortex beams using a metasurface in radio frequency domain

2016 ◽  
Vol 108 (24) ◽  
pp. 241901 ◽  
Author(s):  
Shixing Yu ◽  
Long Li ◽  
Guangming Shi ◽  
Cheng Zhu ◽  
Yan Shi
Keyword(s):  
Angular Momentum ◽  
Radio Frequency ◽  
Frequency Domain ◽  
Orbital Angular Momentum ◽  
Vortex Beams
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