Anomalous Bessel vortex beam: modulating orbital angular momentum with propagation

Singular beams with spatially variant field distributions have various fantastic applications. However, one of the significant challenges that hinder the wide application of singular beams is how to effectively identify the topological charge and the polarization order of arbitrary singular beams. We found that when a light beam with arbitrary polarization state illuminates a polarization-sensitive blazed-grating, the horizontal and vertical component can be separated from the incident beam. Based on this phenomenon, an effective method is proposed to probe the integral topological charge and polarization order of arbitrary singular beams. With this detection method, the vortex beam, cylindrical vector beam and cylindrical vector vortex beam with different topological charges and polarization orders have been experimentally identified. This effective detection method can be widely used to measure the topological charge and polarization order of arbitrary singular beams.

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“…(7). The calculated topological charges and polarization orders of CVVBs are given as (1, 2), (2, 2), (3,2) and (4,2).…”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

Effectively Identifying the Topological Charge and Polarization Order of Arbitrary Singular Light Beams Based on Orthogonal Polarization Separating

Liu

Fan

et al. 2019

IEEE Photonics J.

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“…We have reviewed the remarkable progress that has been made in this field, including optical trapping in suspension and air/vacuum, optical transporting of metal nanoparticles, and the biomedical application of optical trapping. It is clear that optical tweezers will evolve as beam shaping technologies evolve, for example, tractor beams, [177][178][179][180][181][182]242 anomalous vortex beams, 243,244 partially coherent vortex beams, 245,246 grafted vortex beams, 247,248 and structured light with photonic and plasmonic structures. [249][250][251][252][253] There is no doubt that new developments in structured light beams will continuously boost the fields of optical manipulation.…”

Section: Discussionmentioning

confidence: 99%

Optical trapping with structured light: a review

et al. 2021

Self Cite

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Optical trapping describes the interaction between light and matter to manipulate micro-objects through momentum transfer. In the case of 3D trapping with a single beam, this is termed optical tweezers. Optical tweezers are a powerful and noninvasive tool for manipulating small objects, and have become indispensable in many fields, including physics, biology, soft condensed matter, among others. In the early days, optical trapping was typically accomplished with a single Gaussian beam. In recent years, we have witnessed rapid progress in the use of structured light beams with customized phase, amplitude, and polarization in optical trapping. Unusual beam properties, such as phase singularities on-axis and propagation invariant nature, have opened up novel capabilities to the study of micromanipulation in liquid, air, and vacuum. We summarize the recent advances in the field of optical trapping using structured light beams.

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“…The process of FWM signal generation shown in the configuration of Fig. 1 (b) that the signal propagates opposite to 23 and satisfies the momentum conservation 24 – 27 . Secondly, we demonstrate the formation mechanism of lattice states by using standing waves.…”

Section: Basic Theorymentioning

confidence: 99%

Nonlinear optical induced lattice in atomic configurations

Hui

Wen

et al. 2020

Sci Rep

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Traditional artificial lattice with untunable refractive index have been restricted to flexible applied to kinds of micro medium imaging. This study proposes a novel approach to quantifying lattice using nonlinear optically induced periodic lattice, which possesses a striking feature of tunable refractive index, to further broaden current knowledge of optical imaging equipment. We conduct self-dressed and dual-dressed nonlinear four-wave mixing (FWM) signal modulation in the atoms by using the dressing effect of standing waves, and then investigate the space amplitude modulation and synthetization (amplitude and phase) modulation of the electromagnetic induced lattice (EIL) of FWM signal at the atom surface. The EIL presented in the far-field diffraction region confirms that diffraction intensity of the FWM signal can be easily transformed from zero-order to higher-order based on the dispersion effects. The tunable EIL with ultra-fast diffraction energy change can contribute to a better understanding of nonlinear process and provides a further step toward developing two-dimensional nonlinear atomic higher-resolution.

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Anomalous Bessel vortex beam: modulating orbital angular momentum with propagation

Cited by 73 publications

References 35 publications

Effectively Identifying the Topological Charge and Polarization Order of Arbitrary Singular Light Beams Based on Orthogonal Polarization Separating

Effectively Identifying the Topological Charge and Polarization Order of Arbitrary Singular Light Beams Based on Orthogonal Polarization Separating

Optical trapping with structured light: a review

Nonlinear optical induced lattice in atomic configurations

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