Bessel beam

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

Airy beams for laser manipulation of airborne light-absorbing particles

Abstract: We investigate laser manipulation of airborne light-absorbing particles trapped by two-dimensional Airy beams (AiBs). The unique properties of these beams, namely propagation along accelerating trajectories and self-healing allowed us to demonstrate the possibility of trapped particles to bend around obstacles. Previously, only straight-forward propagating laser beams were used for the laser guiding of airborne light-absorbing particles. For example, Gaussian, optical vortices, or conical beams. Such straight-forward propagating laser beams can only push or pull the trapped particles along the straight trajectories, thereby limiting the use of laser beams to cases of the manipulation of the particles which are in a line of sight. In this article, the trajectories of the particles trapped using a straight-forward propagating Bessel beam and AiB were compared and the experiments showed the possibility of using AiBs to guide particles in both directions from and toward the laser source depending on the parameters of the trapped particles. We believe that the use of AiBs can significantly expand the use of photophoresis-based laser manipulation and will allow the non-touch trapping and delivery of light-absorbing particles from various reservoirs and areas of space that are "around the corner" and hidden by an obstacle in the air.

New compact optical trapping device by using bessel beam with a novel hybrid fiber structure

Abstract: We simulated the Bessel beam generator with special fiber and lens and fabricated the device. We verified the Bessel beam profile and observed the optical trapping on the various Z-axis positions.

Second harmonic generation of Bessel vortices

Abstract: Summary form only given. During the late 1990s, Bessel (nondiffracting) light beams have been under extensive consideration. An unapertured Bessel beam does not diffract in the case of free propagation. The spatially limited (apertured) Bessel beam is characterized by a suppressed diffraction of the central part of the beam. The nonlinear optics of Bessel J/sub 0/ beams has received growing interest in recent years. The important features of the angular spectrum of SH radiation generated by J/sub 0/ beam in nonlinear crystals have been previously discussed. The nonlinear optical interactions may provide an efficient way for vortex transformation. The second harmonic (SH) and sum-frequency generation of waves with Laguerre-Gaussian vortices were previously studied. In this paper, the results of comprehensive investigation of angular distribution of SH radiation generated by Bessel J/sub 1/, J/sub 2/, J/sub 3/ beam (Bessel vortices) in KTiOPO/sub 4/ crystal are presented.

Modifying Bessel beam profiles with a spherulite-based radial polarizer

Abstract: We present a radial polarizer prepared by growing a thickness-constrained spherulite from an oleoresin polymer. As an insert between crossed linear polarizers, the fabricated device is used to alter the intensity profile of an incident zero-order Bessel beam. Radially polarized output beams have an intensity profile with a pronounced singularity at the center. Beams may be rotated by a simple reorientation of the crossed polarizers. Experimental results with our radial polarizer correspond to a transformation of the Bessel beam order from l=0 to l=2.