Topic
Bessel beam
About: Bessel beam is a research topic. Over the lifetime, 1946 publications have been published within this topic receiving 42264 citations.
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04 Jun 2018
TL;DR: In this article, the propagation of Bessel beam, generated by an axicon with rounded tip, was studied and it was shown that such a defect may lead to the formation of the axially discontinuous central lobe with the structure similar to the "droplets" of light".
Abstract: We study the propagation of Bessel beam, generated by an axicon with rounded tip, and find that such a defect may lead to the formation of the axially discontinuous central lobe with the structure similar to the ‘droplets’ of light.
TL;DR: In this paper, an exact measurement of the refractive indices of acetone from the Physikalisch-Technische Bundesanstalt (PTB), Braunschweig, Germany was ordered.
01 Jul 2010
TL;DR: In this paper, a lens design software integrated beam propagation feature is implemented to design an Airy beam generation setup based on Fourier transform in a coherent optical system and the resulting monochromatic airy beam presents a main lobe FWHM of approximately 30 μm over a diffraction free distance of 15 mm.
Abstract: Airy beams are a new class of nondiffracting beams predicted in 1979 and observed in 2007. In this paper, we show that
beam propagation methods are an effective way to study the behavior of those beams in propagation and to design such
beams. A lens design software integrated beam propagation feature is implemented to design an Airy beam generation
setup based on Fourier transform in a coherent optical system. The setup was reproduced in the lab for experimental
validation using a "cubic-shaped" mirror. The resulting monochromatic Airy beam presents a main lobe FWHM of
approximately 30 μm over a diffraction-free distance of 15 mm. Computational results show excellent agreement with
experimental data as well as with analytical predictions expressed in terms of the optical setup geometrical parameters.
01 Aug 2015
TL;DR: In this article, the authors demonstrate motionless Bessel beam scanning with a spatial light modulator (SLM) by adding a grating phase or chirp phase to translate the beam transversely or axially.
Abstract: We demonstrate motionless Bessel beam scanning with a spatial light modulator (SLM). The scanning control was emulated in the SLM by adding a grating phase or chirp phase to translate the beam transversely or axially.
Patent•
22 Oct 2019
TL;DR: In this paper, the phase of a Daman grating unit is optimized through a genetic algorithm to realize a uniform power beam splitting function; the phases of Bessel beams are superimposed to obtain a total phase; a meta-surface is encoded according to the optimized total phase.
Abstract: The invention relates to a method for generating a Bessel beam array based on a Huygens' meta-surface, belonging to the technical fields of micro nano optics and binary optics applications. The methodcomprises the following steps: the phase of a Daman grating unit is optimized through a genetic algorithm to realize a uniform-power beam splitting function; the phases of Bessel beams are superimposed to obtain a total phase; a meta-surface is encoded according to the optimized total phase; the phases and amplitudes of outgoing beams are adjusted arbitrarily through the meta-surface by changingthe radius of a disk nanopillar unit; and the phase change of the transmitted light can cover the range from 0 to 2*Pi and the transmittance can be kept over 70% by changing the radius of the nanopillar unit, and a processing file of a corresponding medium meta-surface is generated. A Bessel beam array will be generated in the transmission direction when a sample is irradiated by laser, and the generation result is independent of the incident polarization. The method has the characteristics of long propagation distance and high efficiency.