4.5 Article

Polarization-sensitive photonic jet of a dielectric sphere excited by a zero-order Bessel beam

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jqsrt.2022.108093

Keywords

Light scattering; Photonic jets; Generalized Lorenz-Mie theory; Bessel beam; Particle manipulation

Funding

  1. Innovation Ca-pability Support Program of Shaanxi [2021JZY-006]
  2. Fundamental Research Funds for the Central Universities [XJS190507]
  3. Foreigner Young Talent Program [QN20200027010]
  4. Key Research and Development Program of Shaanxi [2019GY-146]

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This paper presents a systematic theoretical investigation on the properties of photonic jets (PJs) generated by a micro-sized particle excited by a Bessel beam. The effects of illumination conditions on PJs are analyzed, revealing fascinating properties and potential applications in particle manipulation and super-resolution imaging.
Properties of photonic jets (PJs) generated by a micro-sized particle depend not only on the parameters of the particle, but also on the illumination conditions of the incident laser beam. To provide physical insights into the evolution of the PJs and reveal the role played by a Bessel beam with different polarizations, a systematical theoretical investigation is implemented on the PJs generated by a sphere excited by a zero-order Bessel beam in this paper. The effects of illumination conditions (polarization, half-cone angle, beam center location) on the PJs are analyzed using the generalized Lorenz-Mie theory (GLMT). Several fascinating properties of PJs, including cage-like PJ beam generated by the central lobe and the second ring of a Bessel beam, super enhancement of light confinement for a radially polarized Bessel beam, PJ beam with a hollow center for an azimuthal polarized Bessel beam, are revealed, which indicate promising potential applications in particle manipulation, super-resolution imaging and others.(c) 2022 Elsevier Ltd. All rights reserved.

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