Generation of topologically diverse acoustic vortex beams with same divergence angle using discrete active helical arrays

2021 ◽  
Vol 130 (6) ◽  
pp. 064501
Author(s):  
Wei Lu ◽  
Hao Sun ◽  
Yu Lan ◽  
Rongzhen Guo
Keyword(s):  
Divergence Angle ◽  
Vortex Beams

scholarly journals Broadband Vortex Beams Generation With Narrow Divergence Angle Using Polarization Insensitive Metasurface

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 218062-218068
Author(s):  
Hongyu Ma ◽  
Xianglin Kong ◽  
Peng Chen ◽  
Weihua Wang ◽  
Kui Han ◽  
...  
Keyword(s):  
Divergence Angle ◽  
Polarization Insensitive ◽  
Vortex Beams

Crack divergence phenomena in tempered glass

2020 ◽  
Vol 13 (3) ◽  
pp. 115-129
Author(s):  
Shin’ichi Aratani
Keyword(s):  
Optimal Design ◽  
High Speed ◽  
Glass Plate ◽  
Acute Angle ◽  
Divergence Angle ◽  
High Speed Photography ◽  
Tempered Glass ◽  
Thick Glass

High speed photography using the Cranz-Schardin camera was performed to study the crack divergence and divergence angle in thermally tempered glass. A tempered 3.5 mm thick glass plate was used as a specimen. It was shown that two types of bifurcation and branching existed as the crack divergence. The divergence angle was smaller than the value calculated from the principle of optimal design and showed an acute angle.

scholarly journals Generation of terahertz superimposed perfect vortex beams

2021 ◽  
pp. 1-1
Author(s):  
Yongqiang Yang ◽  
Tianyi Wang ◽  
Kejia Wang ◽  
Zhengang Yang ◽  
Jinsong Liu
Keyword(s):  
Vortex Beams

scholarly journals Subwavelength Acoustic Vortex Beams Using Self-Demodulation

2021 ◽  
Vol 15 (5) ◽  
Author(s):  
Noé Jiménez ◽  
Joao Ealo ◽  
Rubén D. Muelas-Hurtado ◽  
Aroune Duclos ◽  
Vicent Romero-García
Keyword(s):  
Vortex 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.

Impact of Vertical Stiffness Gradient on the Maximum Divergence Angle

2020 ◽  
Author(s):  
Charles Farbos de Luzan ◽  
Alexandra Maddox ◽  
Liran Oren ◽  
Ephraim Gutmark ◽  
Rebecca J. Howell ◽  
...  
Keyword(s):  
Divergence Angle ◽  
Vertical Stiffness

scholarly journals Total Angular Momentum Dichroism of the Terahertz Vortex Beams at the Antiferromagnetic Resonances

2021 ◽  
Vol 126 (15) ◽  
Author(s):  
A. A. Sirenko ◽  
P. Marsik ◽  
L. Bugnon ◽  
M. Soulier ◽  
C. Bernhard ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Total Angular Momentum ◽  
Vortex Beams

scholarly journals A mode generator and multiplexer at visible wavelength based on all-fiber mode selective coupler

Nanophotonics ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 973-981 ◽  
Author(s):  
Han Yao ◽  
Fan Shi ◽  
Zhaoyang Wu ◽  
Xinzhu Xu ◽  
Teng Wang ◽  
...  
Keyword(s):  
Phase Shift ◽  
Intensity Distribution ◽  
Linear Polarization ◽  
Mode Conversion ◽  
Polarization State ◽  
Stimulated Emission ◽  
Wavelength Multiplexing ◽  
Mode Converters ◽  
Fiber Mode ◽  
Vortex Beams

AbstractUsing an all-fiber mode selective coupler (MSC) at the visible band, here we experimentally demonstrate a generating and wavelength multiplexing scheme for the cylindrical vector (CV) and vortex beams (VBs). The proposed MSCs act as efficient mode converters to produce spectrally insensitive high-order modes (HOMs) at the wavelength ranging from 450 to 980 nm, which have broad operation bandwidth (more than 7 nm), high mode conversion efficiency (94%), and purity (98%), and low insert loss (below 0.5 dB). By adjusting the polarization state and the phase shift of linear polarization (LP)11 mode respectively, the donut-shaped CVs and circular-polarization VBs are achieved. The focused intensity distribution of the donut beam on the cross- and axial-sections is monitored by using a confocal system. The all-fiber solution of producing and multiplexing HOMs opens a new route for stimulated emission depletion microscopy applications.

scholarly journals Electron holography for vortex beams

2020 ◽  
Vol 13 (3) ◽  
pp. 032003 ◽  
Author(s):  
Ken Harada ◽  
Keiko Shimada ◽  
Yoshimasa A. Ono
Keyword(s):  
Electron Holography ◽  
Vortex Beams
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