scispace - formally typeset
Search or ask a question
Topic

Bessel beam

About: Bessel beam is a research topic. Over the lifetime, 1946 publications have been published within this topic receiving 42264 citations.


Papers
More filters
Posted Content
TL;DR: In this paper, the de Broglie Bessel beam is generated by the free evolution of a thin toroidal atomic Bose-Einstein condensate (BEC) which has been set into rotational motion.
Abstract: Bessel beams are plane waves with amplitude profiles described by Bessel functions. They are important because of their property of limited diffraction and their capacity to carry orbital angular momentum. Here we report the creation of a Bessel beam of de Broglie matter waves. The Bessel beam is produced by the free evolution of a thin toroidal atomic Bose-Einstein condensate (BEC) which has been set into rotational motion. By attempting to stir it at different rotation rates, we show that the toroidal BEC can only be made to rotate at discrete, equally-spaced frequencies, demonstrating that circulation is quantized in atomic BECs. The method used here to generate matter wave Bessel beams with a Painted Potential can be viewed as a form of wavefunction engineering which might be extended to implement arbitrary cold atom matter wave holography.

2 citations

Patent
15 Oct 2019
TL;DR: In this article, a light source and adjustment module, a spatial light modulator, a dynamic imaging module and an image detection module are used to generate a collimated Gauss beam, which is then modulated into a non-diffracting zero-order Bessel beam, so that the scattering imaging effect penetrating trough the dynamic liquid media is better.
Abstract: The invention discloses a scattering imaging device and method penetrating through a dynamic liquid media. The device comprises a light source and adjustment module, a spatial light modulator, a dynamic imaging module and an image detection module; the light source and adjustment module is used for generating a collimated Gauss beam; a phase pattern of a zero-order Bessel beam is loaded on the spatial light modulator, and used for modulating the Gauss beam into a non-diffracting zero-order Bessel beam; the dynamic imaging module comprises ground glass and a dynamic scattering media; a target to be detected is arranged between the ground glass and the dynamic scattering media; the ground glass can rotate along a direction perpendicular to a light path, and used for scattering the zero-orderBessel beam; and the dynamic scattering media is used for acquiring the spectrum information of the light field of the target to be detected. According to the device and method provided by the invention, the incident Gauss beam light is modulated into the non-diffracting zero-order Bessel beam, so that the scattering imaging effect penetrating trough the dynamic liquid media is better, and the imaging resolution is improved.

2 citations

Proceedings ArticleDOI
29 Nov 2016
TL;DR: In this article, the authors investigated the coherent properties of vortex Bessel optical beams propagating in turbulent atmosphere and showed that the integral scale of coherence degree of a vortex bessel optical beam essentially depends on the value of a topological charge of the vortex beam.
Abstract: In this paper the coherent properties of the vortex Bessel optical beams propagating in turbulent atmosphere are investigated. The approach to the analysis of this problem is based on the solution of the equation for the second-order transverse mutual coherence function of a field of optical radiation. The behavior of integral scale of coherence degree of vortex Bessel optical beams depending on parameters of a beam and characteristics of turbulent atmosphere is particularly considered. It is shown, that the integral scale of coherence degree of a vortex Bessel optical beam essentially depends on value of a topological charge of a vortex beam. With increase in a topological charge of a vortex Bessel optical beam the value of integral scale of coherence degree of a vortex Bessel optical beam decreases.

1 citations

Patent
11 May 2018
TL;DR: In this paper, a terahertz wave concentrating module is described, which consists of a first lens for changing a terAhertz Bessel beam, which is emitted while a ter AHERT beam penetrates an object to be inspected, so as to have a small angle; and a second lens for concentrating, on a detector, the terAHERT wave having passed through the first lens.
Abstract: According to one embodiment of the present invention, a terahertz wave concentrating module can comprise: a first lens for changing a terahertz wave, which is emitted while a terahertz Bessel beam penetrates an object to be inspected, so as to have a small angle; and a second lens for concentrating, on a detector, the terahertz wave having passed through the first lens.

1 citations

Proceedings ArticleDOI
10 Apr 2016
TL;DR: In this paper, a system comprised of two coupled Bessel beam launchers is presented, and power transfer between the two launchers under a complex-conjugate impedance match is reported.
Abstract: The generation of propagating Bessel beams is typically limited to optical frequencies with bulky experimental setups. Recent work has shown that Bessel beams can be generated at microwave and millimeter wave frequencies using a planar, leaky-wave antenna. In this work, a system comprised of two coupled Bessel beam launchers is presented. By employing a mode-matching technique, a complete solution of the system and its supported modes is obtained. Power transfer between the two launchers under a complex-conjugate impedance match is reported. Additionally, even and odd mode-splitting is discussed in terms of power transfer efficiency. An analysis of the coupled system's even and odd modes of operation show that efficient power transfer is possible. The odd mode is shown to yield higher field confinement and power transfer efficiency.

1 citations


Network Information
Related Topics (5)
Resonator
76.5K papers, 1M citations
87% related
Laser
353.1K papers, 4.3M citations
84% related
Optical fiber
167K papers, 1.8M citations
84% related
Polarization (waves)
65.3K papers, 984.7K citations
79% related
Diffraction
63.7K papers, 1M citations
79% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202373
2022149
2021113
2020126
2019134
2018140