Generation of high-quality optical vortex beams in free-space propagation by microfabricated wedge with spatial filtering technique

2007 ◽  
Vol 91 (5) ◽  
pp. 051103 ◽  
Author(s):  
X.-C. Yuan ◽  
B. P. S. Ahluwalia ◽  
H. L. Chen ◽  
J. Bu ◽  
J. Lin ◽  
...  
Keyword(s):  
Free Space ◽  
Spatial Filtering ◽  
Optical Vortex ◽  
High Quality ◽  
Filtering Technique ◽  
Vortex Beams

scholarly journals Free-space Realization of Tunable Pin-like Optical Vortex Beams

2021 ◽  
Author(s):  
domenico bongiovanni ◽  
Denghui Li ◽  
Michail Goutsoulas ◽  
Hao Wu ◽  
Yi Hu ◽  
...  
Keyword(s):  
Free Space ◽  
Optical Vortex ◽  
Space Realization ◽  
Vortex Beams

scholarly journals Optical vortex lattice: an exploitation of orbital angular momentum

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Liuhao Zhu ◽  
Miaomiao Tang ◽  
Hehe Li ◽  
Yuping Tai ◽  
Xinzhong Li
Keyword(s):  
Angular Momentum ◽  
Optical Tweezers ◽  
Orbital Angular Momentum ◽  
Vortex Lattice ◽  
Optical Vortex ◽  
Yeast Cells ◽  
Particle Manipulation ◽  
Complex Motion ◽  
Potential Applications ◽  
Vortex Beams

Abstract Generally, an optical vortex lattice (OVL) is generated via the superposition of two specific vortex beams. Thus far, OVL has been successfully employed to trap atoms via the dark cores. The topological charge (TC) on each optical vortex (OV) in the lattice is only ±1. Consequently, the orbital angular momentum (OAM) on the lattice is ignored. To expand the potential applications, it is necessary to rediscover and exploit OAM. Here we propose a novel high-order OVL (HO-OVL) that combines the phase multiplication and the arbitrary mode-controllable techniques. TC on each OV in the lattice is up to 51, which generates sufficient OAM to manipulate microparticles. Thereafter, the entire lattice can be modulated to desirable arbitrary modes. Finally, yeast cells are trapped and rotated by the proposed HO-OVL. To the best of our knowledge, this is the first realization of the complex motion of microparticles via OVL. Thus, this work successfully exploits OAM on OVL, thereby revealing potential applications in particle manipulation and optical tweezers.

Femtosecond laser processing of silver-containing glass with optical vortex beams

2014 ◽  
Author(s):  
Konstantin Mishchik ◽  
Yannick Petit ◽  
Etienne Brasselet ◽  
Inka Manek-Hönninger ◽  
Nicolas Marquestaut ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Laser Processing ◽  
Optical Vortex ◽  
Femtosecond Laser Processing ◽  
Vortex Beams

Direct generation of optical vortex beams with tunable topological charges up to 18th using an axicon

2021 ◽  
Vol 143 ◽  
pp. 107339
Author(s):  
Ke Li ◽  
Kaifei Tang ◽  
Da Lin ◽  
Jing Wang ◽  
Bingxuan Li ◽  
...  
Keyword(s):  
Optical Vortex ◽  
Vortex Beams ◽  
Direct Generation ◽  
Topological Charges

Propagation Characteristics of Vortex Beam Using Visualization Analysis in Free Space

2021 ◽  
Vol 16 (5) ◽  
pp. 838-843
Author(s):  
Yan Zhang ◽  
Minru Hao ◽  
Min Shao ◽  
Yunzhe Zhang
Keyword(s):  
Optical Communication ◽  
Free Space ◽  
Simulation Analysis ◽  
Propagation Distance ◽  
Momentum Density ◽  
Linear Momentum ◽  
Propagation Characteristics ◽  
Transverse Profile ◽  
Vortex Beams ◽  
Topological Charges

We theoretically analyze the linear momentum density and orbital angular momentum (OAM) propagation characteristics of Gaussian vortex beams in free space, and perform detailed numerical simulation analysis of the linear momentum density and OAM propagation characteristics. Further, we study the variation of the propagation characteristics with different topological charges. In addition, we also analyzed the position of momentum in the transverse profile, where the momentum density of the spot will be broadened with propagation distance. This study can provide guidance for using vortex beams in optical communication and manipulation.

scholarly journals Strongly Focused Circularly Polarized Optical Vortices Regulated by a Fractal Conical Lens

2019 ◽  
Vol 10 (1) ◽  
pp. 28
Author(s):  
Zhirong Liu ◽  
Kelin Huang ◽  
Anlian Yang ◽  
Xun Wang ◽  
Philip H. Jones
Keyword(s):  
Angular Momentum ◽  
Optical Tweezers ◽  
Numerical Aperture ◽  
Optical Element ◽  
Optical Vortex ◽  
Optical Vortices ◽  
Circularly Polarized ◽  
Strong Focusing ◽  
New Type ◽  
Vortex Beams

In this paper, a recently-proposed pure-phase optical element, the fractal conical lens (FCL), is introduced for the regulation of strongly-focused circularly-polarized optical vortices in a high numerical aperture (NA) optical system. Strong focusing characteristics of circularly polarized optical vortices through a high NA system in cases with and without a FCL are investigated comparatively. Moreover, the conversion between spin angular momentum (SAM) and orbital angular momentum (OAM) of the focused optical vortex in the focal vicinity is also analyzed. Results revealed that a FCL of different stage S could significantly regulate the distributions of tight focusing intensity and angular momentum of the circularly polarized optical vortex. The interesting results obtained here may be advantageous when using a FCL to shape vortex beams or utilizing circularly polarized vortex beams to exploit new-type optical tweezers.

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