We theoretically propose and experimentally generate the nondiffracting Bessel-Poincaré beams whose Stokes vortices radially accelerate during propagation. To this end, we design the Bessel beams whose intensity is specified to be uniformly distributed along the longitudinal direction. By superposing two such Bessel beams having different helical phases and mutually orthogonal polarizations, the synthesized vector beam is endowed with the polarization singularity that can rotate about the optical axis, while the total intensities maintain their profiles. Radially self-accelerating Stokes vortices in the resulting beam can be manipulated by adjusting the predefined parameters in the constituent beams.

Download full-text PDF

Source
http://dx.doi.org/10.1364/AO.438218DOI Listing

Publication Analysis

Top Keywords

stokes vortices
12
radially self-accelerating
8
self-accelerating stokes
8
nondiffracting bessel-poincaré
8
bessel-poincaré beams
8
bessel beams
8
beams
5
vortices nondiffracting
4
beams theoretically
4
theoretically propose
4

Similar Publications

Chaos in Stochastic 2d Galerkin-Navier-Stokes.

Commun Math Phys

April 2024

Department of Mathematics, Tulane University, New Orleans, LA 70118 USA.

We prove that all Galerkin truncations of the 2d stochastic Navier-Stokes equations in vorticity form on any rectangular torus subjected to hypoelliptic, additive stochastic forcing are chaotic at sufficiently small viscosity, provided the frequency truncation satisfies . By "chaotic" we mean having a strictly positive Lyapunov exponent, i.e.

View Article and Find Full Text PDF
Article Synopsis
  • Manipulating fluid flow is crucial for advances in microfluidics, nanoengineering, and biomedicine, and can help address the global energy crisis by achieving zero-drag hydrodynamics.
  • The research tackles challenges posed by the D'Alembert paradox and unresolved Navier-Stokes equations, introducing a new type of hydrodynamic cloak that operates with isotropic and homogeneous viscosity.
  • Key findings highlight the importance of controlling vorticity for achieving zero-drag and hydrodynamic cloaking, challenging the notion that zero drag is impossible and offering insights beneficial for various technologies, including drug delivery systems.
View Article and Find Full Text PDF
Article Synopsis
  • Surface acoustic waves (SAW) generated by piezoelectric devices are gaining interest for their potential to prevent bacterial adhesion on surfaces, though the exact mechanisms remain unclear.
  • This study investigates how SAW-induced boundary-driven streaming affects bacterial attachment in liquid environments, focusing on the creation of micrometer-scale fluid layers that shield against bacteria.
  • Experiments and simulations reveal that the viscous boundary layer and vortices created by SAW can reduce bacterial colonization and biofilm formation, highlighting new strategies for antibacterial applications.
View Article and Find Full Text PDF

Wind over the ocean generates near-inertial velocities. In the open ocean, horizontal variability in the inertial frequency and mesoscale vorticity generate internal waves that transport energy laterally and drive diapcynal mixing in remote locations. In the coastal ocean, horizontal variability is produced by the coastline.

View Article and Find Full Text PDF

Pulsed electric field (PEF) modes of electrodialysis (ED) are known for their efficiency in mitigating the fouling of ion-exchange membranes. Many authors have also reported the possibility of increasing the mass transfer/desalination rate and reducing energy costs. In the literature, such possibilities were theoretically studied using 1D modeling, which, however, did not consider the effect of electroconvection.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!