scholarly journals Experimental investigation of the self-healing of terahertz Bessel beams with orbital angular momentum

2021 ◽  
Vol 5 (45) ◽  
pp. 673-677
Author(s):  
V.S. Pavelyev ◽  
K.N. Tukmakov ◽  
A.S. Reshetnikov ◽  
V.V. Gerasimov ◽  
N.D. Osintseva ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Free Space ◽  
Dispersive Medium ◽  
The Self ◽  
Experimental Results ◽  
Self Healing ◽  
Bessel Beams ◽  
Topological Charges

Experimental results of the investigation of self-healing properties of terahertz Bessel beams with orbital angular momentum (OAM) with topological charges of l=3 and l=4 in free space after passing through a dispersive medium are presented.

Free-space optical communication link with shape-invariant orbital angular momentum Bessel beams

2019 ◽  
Vol 58 (16) ◽  
pp. 4258 ◽  
Author(s):  
Nokwazi Mphuthi ◽  
Lucas Gailele ◽  
Igor Litvin ◽  
Angela Dudley ◽  
Roelf Botha ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Optical Communication ◽  
Free Space ◽  
Communication Link ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Bessel Beams ◽  
Shape Invariant ◽  
Space Optical Communication

Free-space orbital angular momentum division multiplexing with Bessel beams

2011 ◽  
Vol 13 (6) ◽  
pp. 064018 ◽  
Author(s):  
Alberto Gatto ◽  
Matteo Tacca ◽  
Paolo Martelli ◽  
Pierpaolo Boffi ◽  
Mario Martinelli
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Free Space ◽  
Bessel Beams

scholarly journals High-Efficiency Spin-Related Vortex Metalenses

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1485
Author(s):  
Wei Wang ◽  
Ruikang Zhao ◽  
Shilong Chang ◽  
Jing Li ◽  
Yan Shi ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Topological Charge ◽  
High Efficiency ◽  
Infrared Band ◽  
Mid Infrared ◽  
Integrated Devices ◽  
Vortex Beams ◽  
Topological Charges

In this paper, one spin-selected vortex metalens composed of silicon nanobricks is designed and numerically investigated at the mid-infrared band, which can produce vortex beams with different topological charges and achieve different spin lights simultaneously. Another type of spin-independent vortex metalens is also designed, which can focus the vortex beams with the same topological charge at the same position for different spin lights, respectively. Both of the two vortex metalenses can achieve high-efficiency focusing for different spin lights. In addition, the spin-to-orbital angular momentum conversion through the vortex metalens is also discussed in detail. Our work facilitates the establishment of high-efficiency spin-related integrated devices, which is significant for the development of vortex optics and spin optics.

scholarly journals Perspectives on advances in high-capacity, free-space communications using multiplexing of orbital-angular-momentum beams

APL Photonics ◽  
2021 ◽  
Vol 6 (3) ◽  
pp. 030901
Author(s):  
Alan E. Willner ◽  
Zhe Zhao ◽  
Cong Liu ◽  
Runzhou Zhang ◽  
Haoqian Song ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Free Space ◽  
High Capacity ◽  
Space Communications
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