Superposition of monochromatic Bessel beams in (kρ, kz)-plane to obtain wave focusing: Spatial localized waves

2005 ◽  
Vol 249 (4-6) ◽  
pp. 407-413 ◽  
Author(s):  
C.A. Dartora ◽  
K.Z. Nobrega ◽  
Alexandre Dartora ◽  
H.E. Hernandez-Figueroa
Keyword(s):  
Bessel Beams ◽  
Wave Focusing ◽  
Localized Waves

scholarly journals Radial Structure of OAM-Carrying Fundamental X-Waves

2020 ◽  
Vol 11 (1) ◽  
pp. 169
Author(s):  
Souvik Agasti ◽  
Marco Ornigotti
Keyword(s):  
Intensity Distribution ◽  
Degree Of Freedom ◽  
Bessel Beams ◽  
Radial Structure ◽  
Spectral Degree ◽  
Localized Waves

We investigate the spectral degree of freedom of OAM-carrying localized waves and its influence on their transverse intensity distribution. In particular, we focus our attention on exponentially decaying spectra, which are very tightly connected to fundamental X-waves; we then show how it is possible to structure their transverse intensity distribution, thus creating a radial structure similar to that of Bessel beams.

scholarly journals Rotating azimuthons in dissipative Kerr media excited by superpositions of Bessel beams

2020 ◽  
Vol 102 (6) ◽  
Author(s):  
Carlos Ruiz-Jiménez ◽  
Hervé Leblond ◽  
Miguel A. Porras ◽  
Boris A. Malomed
Keyword(s):  
Bessel Beams ◽  
Kerr Media

Generation of anomalous vector Bessel beams with varying polarization order along the propagation direction

Optik ◽  
2021 ◽  
Vol 232 ◽  
pp. 166578
Author(s):  
Bo Yang ◽  
Mingyang Su ◽  
Liming Lu ◽  
Junmin Liu ◽  
Guangyue Chai
Keyword(s):  
Propagation Direction ◽  
Bessel Beams

scholarly journals Generation of terahertz vector beams using dielectric metasurfaces via spin-decoupled phase control

Nanophotonics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 3393-3402 ◽  
Author(s):  
Yuehong Xu ◽  
Huifang Zhang ◽  
Quan Li ◽  
Xueqian Zhang ◽  
Quan Xu ◽  
...  
Keyword(s):  
High Performance ◽  
Special Kind ◽  
Phase Control ◽  
High Resolution Imaging ◽  
Plasmon Excitation ◽  
Bessel Beams ◽  
Dynamic Phase ◽  
Vector Beams ◽  
Resolution Imaging ◽  
Spatially Variant

AbstractCylindrical vector beams (CVBs), being a special kind of beams with spatially variant states of polarizations, are promising in photonics applications, including high-resolution imaging, plasmon excitation, optical trapping, and laser machining. Recently, generating CVBs using metasurfaces has drawn enormous interest owing to their highly designable, multifunctional, and integratable features. However, related studies remain unexplored in the terahertz regime. Here, a generic method for efficiently generating terahertz CVBs carrying orbital angular momentums (OAMs) is proposed and experimentally demonstrated using transmission-type spatial-variant dielectric metasurfaces, which is realized by designing the interference between the two circularly polarized transmission components. This method is based on spin-decoupled phase control allowed by simultaneously manipulating the dynamic phase and geometric phase of each structure, endowing more degree of freedom in designing the vector beams. Two types of metasurfaces which respectively generate polarization-dependent terahertz vector vortex beams (VVBs) and vector Bessel beams (VBBs) are experimentally characterized. The proposed method opens a new window to generate versatile vector beams, providing new capabilities in developing novel, compact, and high-performance devices applicable to broad electromagnetic spectral regimes.

Generation of nonuniformly polarised vortex Bessel beams by an interference polariser

2018 ◽  
Vol 48 (6) ◽  
pp. 521-526 ◽  
Author(s):  
S V Karpeev ◽  
V D Paranin ◽  
S N Khonina
Keyword(s):  
Bessel Beams

Guided Wave Focusing Mechanics in Pipe

2003 ◽  
Author(s):  
Takahiro Hayashi ◽  
Koichiro Kawashima ◽  
Zongqi Sun ◽  
Joseph L. Rose
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Guided Waves ◽  
Wave Structure ◽  
Guided Wave ◽  
Pipe Inspection ◽  
Specific Point ◽  
Wave Focusing ◽  
Beam Focusing ◽  
Subsequent Time

Guided waves can be used in pipe inspection over long distances. Presented in this paper is a beam focusing technique to improve the S/N ratio of the reflection from a tiny defect. Focusing is accomplished by using non-axisymmetric waveforms and subsequent time delayed superposition at a specific point in a pipe. A semi-analytical finite element method is used to present wave structure in the pipe. Focusing potential is also studied with various modes and frequencies.

Study of Frozen Waves’ theory through a continuous superposition of Bessel beams

2007 ◽  
Vol 39 (7) ◽  
pp. 1370-1373 ◽  
Author(s):  
C.A. Dartora ◽  
K.Z. Nobrega ◽  
Alexandre Dartora ◽  
Gustavo A. Viana ◽  
Horacio Tertuliano S. Filho
Keyword(s):  
Bessel Beams
Sign in / Sign up

Export Citation Format

Share Document