scholarly journals Systematically Investigating the Structural Variety of Crystalline and Kaleidoscopic Vortex Lattices by Using Laser Beam Arrays

2021 ◽  
Vol 11 (17) ◽  
pp. 8018
Author(s):  
Chengshang Chen ◽  
Yuhan Fang ◽  
Chichen Jang ◽  
Wenchi Chen ◽  
Hui-Chi Lin ◽  
...  
Keyword(s):  
Numerical Calculation ◽  
Numerical Analysis ◽  
Laser Beam ◽  
Vortex Lattice ◽  
Phase Plate ◽  
Lattice Structures ◽  
Vortex Lattices ◽  
Structural Variety ◽  
Theoretical Results ◽  
Spiral Phase

We theoretically demonstrate that a family of vortex-lattice structures can be flexibly generated using a multi-beam interference approach. Numerical calculation presents a variety of crystalline and kaleidoscopic patterns. Based on the numerical analysis, we experimentally realized these structure beams by combining an amplitude mask with multiple apertures and a spiral phase plate. The excellent agreement between the experimental and theoretical results not only validates the presented method, but also manifests the structure of vortex lattices.

Orbital angular momentum of a laser beam behind an off-axis spiral phase plate

2019 ◽  
Vol 44 (15) ◽  
pp. 3673 ◽  
Author(s):  
Victor Kotlyar ◽  
Alexey Kovalev ◽  
Alexey Porfirev ◽  
Elena Kozlova
Keyword(s):  
Angular Momentum ◽  
Laser Beam ◽  
Orbital Angular Momentum ◽  
Phase Plate ◽  
Spiral Phase Plate ◽  
Spiral Phase

scholarly journals Complex 3D Vortex Lattice Formation by Phase-Engineered Multiple Beam Interference

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Jolly Xavier ◽  
Sunil Vyas ◽  
Paramasivam Senthilkumaran ◽  
Joby Joseph
Keyword(s):  
Relative Phase ◽  
Vortex Lattice ◽  
Plane Waves ◽  
Lattice Structures ◽  
Computational Results ◽  
Vortex Lattices ◽  
Relative Phase Shift ◽  
Lattice Formation ◽  
Multiple Plane ◽  
Analytical Tools

We present the computational results on the formation of diverse complex 3D vortex lattices by a designed superposition of multiple plane waves. Special combinations of multiples of three noncoplanar plane waves with a designed relative phase shift between one another are perturbed by a nonsingular beam to generate various complex 3D vortex lattice structures. The formation of complex gyrating lattice structures carrying designed vortices by means of relatively phase-engineered plane waves is also computationally investigated. The generated structures are configured with both periodic as well as transversely quasicrystallographic basis, while these whirling complex lattices possess a long-range order of designed symmetry in a given plane. Various computational analytical tools are used to verify the presence of engineered geometry of vortices in these complex 3D vortex lattices.

scholarly journals Off-Axis Vortex Beam Propagation through Classical Optical System in Terms of Kummer Confluent Hypergeometric Function

Photonics ◽  
2020 ◽  
Vol 7 (3) ◽  
pp. 60
Author(s):  
Ireneusz Augustyniak ◽  
Weronika Lamperska ◽  
Jan Masajada ◽  
Łukasz Płociniczak ◽  
Agnieszka Popiołek-Masajada
Keyword(s):  
Laser Beam ◽  
Gaussian Beam ◽  
Image Plane ◽  
Optical Vortex ◽  
Confluent Hypergeometric Function ◽  
Higher Order ◽  
Phase Plate ◽  
Axis Position ◽  
Spiral Phase Plate ◽  
Spiral Phase

The analytical solution for the propagation of the laser beam with optical vortex through the system of lenses is presented. The optical vortex is introduced into the laser beam (described as Gaussian beam) by spiral phase plate. The solution is general as it holds for the optical vortex of any integer topological charge, the off-axis position of the spiral phase plate and any number of lenses. Some intriguing conclusions are discussed. The higher order vortices are unstable and split under small phase or amplitude disturbance. Nevertheless, we have shown that off-axis higher order vortices are stable during the propagation through the set of lenses described in paraxial approximation, which is untypical behavior. The vortex trajectory registered at image plane due to spiral phase plate shift behaves like a rigid body. We have introduced a new factor which in our beam plays the same role as Gouy phase in pure Gaussian beam.

A Spiral Phase Plate for an Optical Vortices Generation

2018 ◽  
pp. 1-43 ◽  
Author(s):  
V. V. Kotlyar ◽  
A. A. Kovalev ◽  
A. P. Porfirev
Keyword(s):  
Optical Vortices ◽  
Phase Plate ◽  
Spiral Phase Plate ◽  
Spiral Phase

scholarly journals FEASIBILITY STUDY OF MICRO-LATTICE STRUCTURES BY MULTIPHOTON LITHOGRAPHY

2019 ◽  
Vol 25 ◽  
pp. 83-88
Author(s):  
Markus Wimmer ◽  
Zoltan Major
Keyword(s):  
Additive Manufacturing ◽  
Laser Beam ◽  
Constant Density ◽  
Lattice Structures ◽  
Post Processing ◽  
Constant Frequency ◽  
Layer Height ◽  
Lithography Process ◽  
Multiphoton Lithography ◽  
Laser Firing

The paper describes the possibilities of additive manufacturing with multiphoton lithography. The basis of this technology is that a laser beam (with a certain wavelength) is fired into the mixture of a monomer and a photo-initiator. When the energy of the laser is high enough, the latter acts as a catalyser for the polymerization of the monomer compound. This study focuses on the influences of certain parameters of the multiphoton lithography process. One of the important aspects is the choice of the solvent for the post processing. In sequence to the solvent problem, the influence of the layer height is examined. Furthermore the limits and possibilities of the setup in use are investigated. As an example the differences in fabrication with the laser firing with "constant frequency" and "constant density" were subject of this investigation. The second goal of the study was to compare three different structures consisting of periodically repeating elements, scaled in size and number of elements per side.

Influences of Spiral Phase Plate′s Parameters on Spiral Phase Contrast Microscopy

2012 ◽  
Vol 32 (4) ◽  
pp. 0411002
Author(s):  
王炯 Wang Jiong ◽  
张雨东 Zhang Yudong ◽  
李国俊 Li Guojun ◽  
罗先刚 Luo Xiangang ◽  
张小军 Zhang Xiaojun ◽  
...  
Keyword(s):  
Phase Contrast ◽  
Phase Plate ◽  
Phase Contrast Microscopy ◽  
Contrast Microscopy ◽  
S Parameters ◽  
Spiral Phase Plate ◽  
Spiral Phase
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